The construction industry has faced major challenges in recent years. A number of different circumstances have had a great impact on the global economy, one of the largest being Russia’s military invasion of Ukraine, but also the Covid-19 pandemic, the impending energy crisis and the increasing inflation. The effects of these events have had an impact on delayed deliveries as well as labor and materials in construction projects. In a fixed-price contract, it is usually the contractor who bears the risk for cost changes. The regulation in 6:3 AB 04 and ABT 06 exists to balance unforeseeable cost changes, in that unpredictable cost changes can lead to the fixed price being adjusted. The purpose of the regulation is to make it possible for the employer to obtain tenders that are comparable. Otherwise, the contractor’s risk calculation would partly be based on arbitrariness. The purpose of this thesis is to analyze in which situations a party can request a price adjustment in accordance with 6:3 AB 04 and ABT 06 and shed light on other possible regulations regarding cost changes by examining the corresponding Norwegian and Danish standard contracts. Furthermore, the thesis examines how the parties in commercial constructions negotiate contracts when they are not satisfied with the solution prescribed in the standard agreements, i.e. how the parties can adjust the risks with an index. This is done by applying legal dogmatic method in combination with comparative method. The thesis also contains elements from sociology of law, regarding how the industry has adapted today’s challenges in index clauses in construction agreements.  This thesis explains in greater detail the different components of 6:3 AB 04 and ABT 06 in order to clarify in which situations the regulation can be applied. The conclusion is that 6:3 consists of a number of unclear components, which require a legal assessment that determines whether the regulation can be applied. However, certain components have been able to be clarified, such as the relationship between the relevant circumstance and foreseeability, which point in time that is decisive for the foreseeability assessment and how several different cost changes can affect the materiality. An index might be useful while examining 6:3 since an index can be used as an aid in determining abnormal price changes and in the materiality assessment.  The thesis compares the Swedish regulation with the Norwegian and Danish regulations, which leads to the conclusion that there is no Nordic cooperation regarding price adjustment due to cost changes. The Norwegian standard contracts are based on an indexation regulation, otherwise there is no possibility for a party to request a price adjustment, except regarding government fees. Similar to the Norwegian regulation, the Danish standard contracts are also based on an indexation regulation, which regulates the price from one year after the tender. The Danish standard contracts also contain a provision that can provide price adjustment as a result of cost increases for materials and fuel if the increases reach certain percentages. While the Danish regulation contains more concrete components, the Swedish regulation is more flexible and includes several different types of cost changes.  Finally, an increased interest has been noted regarding index clauses in Swedish constructions. The thesis discusses the impact of the choice of index regulation. Whether the index handles current cost changes in such a way that the contractor receives full coverage for his expenses, depends to a large extent on which index is chosen and how the index clause is formulated.

Thesis (MScEng)--Stellenbosch University, 2012. / ENGLISH ABSTRACT: Sustainability is difficult to achieve in a world where population and economic growth leads to increased production of greenhouse gases, resource depletion and waste generation. Today, the environmental dimension of sustainability, which is more commonly known as the natural environment, and the construction industry are two terms often mentioned together. In Europe, 12.4 % of greenhouse gas emissions are induced by the construction and manufacturing industry (Maydl, 2004). Also, 50 % of the resources extracted are used in the construction industry and more than 25 % of waste generated is construction and demolition waste. In South Africa, the building sector accounts for approximately 23 % of the total greenhouse gas emissions (Milford, 2009). Furthermore, 60 % of investment is made in the residential sector where 33 % of the building stock is the focus of the government’s Housing Programme. It is seen that the construction industry significantly impacts the natural environment and the aim should be to reduce this negative impact. Within the local residential sector, the low-cost housing sector presents potential when it comes to sustainable improvements. Each of the three spheres of sustainability, namely economy, natural environment and society, plays a crucial role in this sector. Various studies have been done on the economical and social fields, but little information exists on the impact low-cost houses have on the environment. A need arises to scientifically quantify the environmental impact hereof, therefore it is chosen as the focus of this study. Various methods in order to determine the environmental impact of the built environment exist globally, but they tend to be complex, are used in conjunction with difficult to understand databases and require expensive software. A need for a local quantification method with which to determine the environmental impact of the built environment, more specifically low-cost housing, has been identified. A simple and easy-to-use analysis-orientated quantification method is proposed in this study. The quantification method is compiled with indicators related to the local conditions; these include Emissions, Resource Depletion and Waste Generation. The end objective is to provide the user with an aggregated total value called the Environmental Impact Index to ease comparison of possible alternatives. The quantification method is developed as a mathematical tool in the form of a partial Life Cycle Assessment which can aid in objective decision making during the conception and design phase of a specific project. Note that only the Pre-Use Phase of the building life cycle is considered during the assessment, but can be extended to include the Use Phase and End-of-Life Phase. The proposed method has the capability of calculating and optimising the environmental impact of a building. Regarding low-cost housing, different housing unit designs can be compared in order to select the best alternative. The quantification method is implemented for two low-cost house design types in this study. Firstly, the conventional brick and mortar design is considered whereafter a Light Steel Frame Building is viewed as an alternative. The model implementation demonstrates that the model operates in its supposed manner. Also, Light Steel Frame Building housing units are shown to be worth investigating as an alternative to the conventional brick and mortar design but should be confirmed with a more accurate Life Cycle Assessment. / AFRIKAANSE OPSOMMING: In ’n wêreld waar toenemende ekonomiese en bevolkingsgroei veroorsaak dat al hoe meer kweekhuisgasse voortgebring word, hulpbronne uitgeput word en groter hoeveelhede rommel geproduseer word, is dit ’n bykans onbegonne taak om volhoubaarheid te probeer bereik. Volhoubaarheid rakende die natuurlike omgewing en konstruksie is twee terme wat vandag dikwels saam genoem word. Ongeveer 12.4 % van die kweekhuisgasse wat in Europa vrygestel word kom uit die konstruksie- en vervaardigingbedrywe (Maydl, 2004). Die konstruksiebedryf gebruik ook bykans die helfte van hulpbronne wat ontgin word en meer as 25 % van rommel word deur konstruksie of sloping produseer. Die Suid-Afrikaaanse boubedryf is verantwoordelik vir 23 % van die totale hoeveelheid kweekhuisgasse wat die land vrystel. Die behuisingsektor, waar die regering aan die hoof van 33 % van eenhede staan, ontvang 60 % van bestaande beleggings (Milford, 2009). Dit is dus duidelik dat die boubedryf ’n negatiewe impak op die natuurlike omgewing het en dat dit van groot belang is om dié situasie te verbeter. In die behuisingsektor het lae-koste-behuising groot potensiaal as dit kom by volhoubaarheid. Volhoubaarheid bestaan uit drie sfere: ekonomie, natuurlike omgewing en sosiaal, en al drie speel ’n betekenisvolle rol in lae-koste-behuising. Daar is reeds verskeie studies aangepak om die ekonomiese en sosiale sfere te beskryf, maar daar is steeds min inligting beskikbaar oor die omgewingsimpak van ’n lae-koste-huis. Dit laat die behoefte ontstaan om hierdie impak te kwantifiseer. Bestaande metodes wat wêreldwyd gebruik word om ʼn omgewingsimpak te bepaal is dikwels besonder kompleks en benodig duur sagteware tesame met ingewikkelde databasisse om dit te implementeer. ’n Behoefte aan ’n plaaslike kwantifiseringsmetode is geïdentifiseer. Hierdie studie stel ’n eenvoudige, gebruikersvriendelike kwantifiseringsmetode bekend. Dit word saamgestel uit faktore wat verband hou met die plaaslike omgewing: Uitlaatgasse, Hulpbronuitputting en Rommelvervaardiging. Uiteindelik word ’n saamgestelde waarde, wat die Omgewingsimpak-indeks genoem word, bereken om vergelyking te vergemaklik. Hierdie kwantifiseringsmetode word aan die hand van ’n gedeeltelike lewenssiklus-analise as ’n wiskundige hulpmiddel ontwikkel. Slegs die eerste fase van ’n gebou se lewenssiklus word beskou tydens hierdie studie, maar dit is moontlik om die ander twee fases in te sluit. Die voorgestelde metode het die vermoë om die omgewingsimpak te bereken en ook te optimeer. Tydens die ontwerpsfase, wanneer belangrike besluite geneem moet word, kan so ’n hulpmiddel van enorme waarde wees om die beste opsie uit verskillende alternatiewe te help identifiseer. Die studie beskou twee tipes behuisingseenhede vir die doel van implementering van die kwantifiseringsmetode: die konvensionele baksteen en mortel metode en alternatiewelik ’n ligte staalraamwerk-gebou. Tydens implementering van die voorgestelde metode, demonstreer die model dat dit werk soos dit veronderstel is om te funksioneer. Verder is getoon dat ’n ligte staalraamwerk-gebou ’n waardevolle alternatief is om te ondersoek, maar dit moet liefs met ’n meer akkurate lewenssiklus-analise bevestig word.

The construction industry is constantly evolving with new products and building technical solutions. The construction industry organization jointly developed regulations known as standard contracts, or general regulations, which includes ten chapters. The standard contracts describe what the constructor industry should relate to in terms of performance and responsibility. When the standard contracts were negotiated about between the various parties in the industry some sections were developed through compromises. It is mainly in these sections misunderstandings, interpretations differences and conflicts occur. This report investigates in which sections conflicts commonly occur, what the consequences are and how the generally perception of the standard contracts is in the industry. The report also suggests solutions and improvements to the standard contracts. Eleven basic questions based on the generally perceptions of the standard contracts and the first six chapters of the standard contracts have been developed to clarify where disputes and misunderstandings may occur. The remaining four chapters have been deliberately excluded to limit the scope of this report. The content of the report is mainly based of twenty interviews with contractors and clients. The study shows that the perception of the standard contracts is positive and serves as a good tool to know what to relate to. The standard contracts should however adapt more to today's technological society. The study also presents suggestions on methods and advices that can be used to facilitate communication in the construction industry. This thesis in the Bachelor of Science in Construction Engineering at Uppsala University has carried out for ten weeks at a property company Klövern in Kista. / Byggbranschen utvecklas ständigt med nya produkter och byggtekniska lösningar vilket gör att uppförandet och förhållningssättet ändras med tiden. Branschorganisationen har gemensamt framtagit föreskrifter som benämns standardavtalen eller Allmänna bestämmelser som innefattar tio kapitel. I standardavtalen förklaras vad parterna ska förhålla sig till exempelvis vad gäller utförandet och vilket ansvar de har rent juridiskt. Det här för att undvika att parter hamnar i tvist med varandra. Man kan se standardavtalen som spelregler för byggbranschen som då vet vad man ska förhålla sig till. Då standardavtalen har förhandlats fram mellan de olika parterna i branschen innehåller de en del paragrafer som har tagits fram genom kompromisser och det är främst här missförstånd, oliktolkningar och konflikter uppstår. Den här rapporten undersöker vilka frågor som leder till att tvister vanligast uppkommer, i viss mån vad konsekvenserna blir och vidare undersöks hur synen på standardavtalen överlag ser ut i branschen. Rapporten leder fram till förslag hur standardavtalen överlag kan förbättras. Arbetet baseras på elva grundfrågeställningar kring den allmänna uppfattningen av standardavtalen samt ett antal frågor rörande bestämmelser i de sex första kapitlen i standardavtalen. Dessa har tagits fram för att klargöra vart tvister och missförstånd kan tänkas uppkomma. De resterande fyra kapitlen har medvetet uteslutits för att begränsa omfattningen i den här rapporten. Innehållet i rapporten grundar sig främst i ett tjugotal intervjuer som har genomförts med entreprenörer och beställare. Undersökningen visar att synen på standardavtalen är positiv och fungerar som ett bra verktyg för att veta vad man ska förhålla sig till. Standardavtalen bör dock anpassas till dagens tekniska samhälle. Det redovisas även förslag på metoder och råd som kan användas för att underlätta kommunikationen mellan parterna. Detta examensarbete inom högskoleingenjörsprogrammet i byggteknik på Uppsala universitet har utförts under tio veckor åt fastighetsbolaget Klövern i Kista.

La progression tumorale est la conséquence de multiples altérations génotypiques et phénotypiques; L'une d'entre elles, nécessaire à la formation de métastases, est l'acquisition d'une résistance à l'anoïkis, forme d'apoptose induite par la perte d'attachement à la matrice extra-cellulaire. Afin d'étudier l'anoïkis, nous avons utilisé deux lignées colorectales humaines isogéniques : la lignée SW480 dérivée de la tumeur primaire et sensible à l'anoïkis et la lignée SW620 dérivée d'une métastase ganglionnaire de cette même tumeur et résistante à l'anoïkis. Nous avons établi que dans les cellules SW480, l'anoïkis est une forme d'apoptose intrinsèque c'est-à-dire débutant à la mitochondrie et donc sous le contrôle des protéines de la famille Bcl-2. Parmi celles-ci, nous avons trouvé que seule la protéine proapoptotique à BH3-seul Bim était régulée différemment dans les deux lignées : tandis que son expression augmente de manière très significative dans les cellules SW480 cultivées en suspension, elle n'augmente que très peu dans les cellules SW620. De manière très intéressante, et malgré cette différence, les deux lignées se sont montrées être sensibles au BH3-mimétique ABT-737 mais seulement lorsqu'elles sont cultivées en suspension. Ces résultats indiquent que, qu'elles soient sensibles ou non à l'anoïkis, les cellules détachées sont " prédisposées à la mort " et que des composés semblables à l'ABT-737 tels que le Navitoclax ou l'ABT-199 pourraient avoir des propriétés anti-métastiques dans les tumeurs solides. Dans la seconde partie de ce travail, nous montrons que la protéine transmembranaire CDCP1 ( CUB Domain Containing Protein 1) semble nécessaire mais non suffisante pour protéger ces cellules contre l'anoïkis. CDCP1 est un substrat de Src mais sa phosphorylation sur tyrosine n'est pas impliquée dans cette protection. Finalement, nous avons identifié deux nouvelles protéines qui interagissent avec CDCP1 : l'ITGB4 et l'EphA2

Bcl-xL et Mcl-1 sont deux protéines anti-apoptotiques de la famille Bcl-2 dont dépendent les cancers de l’ovaire pour leur survie, leur inhibition semble donc être une stratégie pertinente. La molécule BH3-mimétique ABT 737 (ou son analogue oral, l’ABT-263), est un puissant inhibiteur de Bcl-xL mais l’inhibition de Mcl-1 reste problématique. Les voies de signalisation PI3K/Akt/mTOR et MAPK/ERK régulent l’expression et l’activité de cette dernière protéine et de ses partenaires BH3-only (Bim, Puma, Noxa). Nous nous sommes donc intéressés à l’intérêt de leur inhibition pour sensibiliser les cellules cancéreuses ovariennes à l’ABT-737. La première étude menée avec le BEZ235, double inhibiteur PI3K/mTOR développé par le laboratoire Novartis, montre qu’il inhibe l’expression de Mcl-1 et induit celle de Puma, et qu’il sensibilise les cellules cancéreuses ovariennes à l’ABT-737 à condition que l’expression de Bim soit également induite. La deuxième étude a évalué les effets de l’AZD8055, inhibiteur du site actif de mTOR développé par le laboratoire AstraZeneca, et du trametinib, inhibiteur allostérique de MEK développé par le laboratoire GlaxoSmithKline et actuellement en clinique, sur trois lignées cancéreuses ovariennes. L’inhibition de l’expression de Mcl-1 et l’induction de celle de Puma par l’AZD8055 ne permettent pas de diminuer suffisamment le ratio [Mcl-1/protéines BH3-only] pour sensibiliser les cellules à l’ABT-737. En revanche, la forte induction de Bim sous forme active déphosphorylée par le trametinib permet de diminuer suffisamment ce ratio pour sensibiliser deux des trois lignées testées à l’ABT-737. C’est cependant la triple combinaison AZD8055/trametinib/ABT-737 qui est la plus efficace pour induire une apoptose massive dans les trois lignées. Par ailleurs, de façon intéressante, l’association de l’AZD8055 et du trametinib est cytotoxique sans ABT 737 dans une des lignées testées. Ces résultats mettent en évidence l’efficacité de différentes stratégies thérapeutiques multi-cibles et la nécessité de définir des marqueurs prédictifs de la réponse afin d’évoluer vers un traitement personnalisé pour améliorer la prise en charge des cancers de l’ovaire. / Ovarian cancers depend on Bcl-xL and Mcl-1, two anti-apoptotic protein of the Bcl-2 family, for their survival and their inhibition seems to by a relevant strategy. The BH3-mimetic molecule ABT-737 (or its oral form, ABT-263), is a strong Bcl-xL inhibitor, but Mcl-1 inhibition remains problematic. Signaling pathways PI3K/Akt/mTOR and MAPK/ERK regulate expression and activity of Mcl-1 and its BH3-only partners (Bim, Puma, Noxa). We focused on the interest of their inhibition to sensitize ovarian cancer cells to ABT-737. The first study with BEZ235, a PI3K/mTOR dual inhibitor developed by Novartis, inhibits Mcl-1 expression and induces the one of Puma, and sensitizes ovarian cancer cells to ABT-737 provided that Bim expression is induced. The second study evaluated the effects of AZD8055, mTOR active site inhibitor developed by AstraZeneca, and of trametinib, MEK allosteric inhibitor developed by GlaxoSmithKline and currently in clinic, on three ovarian cancer cell lines. Mcl-1 expression inhibition and Puma expression induction by AZD8055 does not sufficiently reduce [Mcl-1/BH3-only proteins] ratio to sensitize cells to ABT-737. On the other hand, strong Bim induction in its active dephosphorylated form by trametinib sufficiently reduce this ratio to sensitize two of the three cell lines tested to ABT-737. Nevertheless, the triple combination AZD8055/trametinib/ABT-737 is the most efficient to induce massive apoptosis in the three cell lines. Besides, interestingly, AZD8055 and trametinib association is cytotoxic without ABT-737 in one of the tested cell lines. These results highlight the efficacy of different multi-targets therapeutic strategies and the need of predictive marker definition of the response to develop personalized treatment and to improve ovarian cancer management.

Partnering is an increasingly common form of project in the construction industry. From its inception in the late 80's in the USA until today, the habit and knowledge are increasing about how to carry out an effective partnering project and what to look out for. Previous reports have been focused on what partnering is and thoroughly how it is works. This report is written together with Skanska Sverige ABs Orebro Office. The purpose is to investigate the major practical pros and cons, when you manage a partnering project instead of a regular one with a fixed price. The selected areas of interest are Finance, Stress, Accidents & Incidents, the problem-solving process and what kind of project is best applicable. Facts are mainly taken from interviewed employees at Skanska and relevant clients they have been in contact with.Finance is the most influential factor in which choice of contractor that gets the deal, in terms of fixed price projects. The sum for which the customer buys a contractor is including risk calculations and fee margins leading to the percentage margin can be quite high. It is up to the contractor to perform the work with the money which they have been bought. If the construction costs run high, the contractor still does not get paid more. If it costs less, the contractor saves more money than planned.In a partnering project, the contract sum is stated between the two parties and a reasonable percentage are generated as a fee for the contractor. The contractor earns this amount regardless of production cost. This can differentiate the total percentage of earnings, if it will be greater or less than expected. The incentive is to create as good a product as possible and at the same time reduce production costs. The arrangement is positive for both parties as a stable income comes to the contractor and the client is able to influence the project more. The benefits are greatest in larger, longer and more complex projects where the risk is greater.Stress generally decreases in partnering projects as it is based on creating one community and to helping each other. No conflicting discussions about whose fault it was but the focus is on how to solve the problem. This leads to an improved problem-solving process and an estimated reduction of Accidents & Incidents in the majority of individuals who are deeply familiar and accustomed to this type of partnering project.The financial incentive promotes a company that wants to increase the percentage of its earnings for its shareholders instead of those that focus on current sales and the money flow. It creates more satisfied customers who realize that the company is not wasteful of their money. This means that companies that are listed on the stock exchange market can possibly get better results from partnering.The conclusion is that the optimal projects for this type of cooperation are those with sales of more than 100 million SEK that last for a long time and have greater complexity. This is because smaller projects cannot use the systems which partnering has to offer because the project is already rounded off when the partnering is at its best. Partnering is a good, stable and secure form of cooperation for both client and contractor as it is a stable income for the contractor and that the client has a better opportunity to influence the project. This as well as the final cost for the client should be as low as possible.

No description available.

Thesis (MEng)--Stellenbosch University, 2013. / Please see accompanying Errata document to be viewed with original document. / ENGLISH ABSTRACT: The current housing backlog facing the informal residents of South Africa is daunting. With current research showing that the backlog is not shrinking fast enough, the stakeholders of the formal and informal housing sector are facing an immense challenge. Most houses constructed after 1994 utilised conventional brick and mortar construction, with alternative means of building homes taking up a negligible share in the total housing supply. The purpose of this study is to test the feasibility of container-based homes as an alternative to brick and mortar homes in South Africa’s low-cost housing supply according to the triple constraints of project management i.e. cost, time and quality. Social acceptance and environmental sustainability are also analysed as two secondary parameters that will influence container-based projects. These parameters form the basis of the three pillars of sustainability, i.e. economic, societal and environmental parameters, which indicates the feasibility of a new design implementation. Two test cases for the feasibility study were designed. The first case considers a modular single-storey residential home, equivalent to standard “Breaking New Ground” housing solutions. The second test case considers a multi-storey, medium-density residential building, capable of housing multiple families .The test cases represent possible container-based solutions, with traditional brick and mortar construction (single and multi-storey) acting as the control solution. The three sustainability parameters act as benchmarks of each solutions’ feasibility, with the control solution acting as the counter-performance example. The comparison of the economic parameter relies on the cost of each design case, its construction time and the quality of the end-product. The bills of quantities were measured against a conventional building type, and it was found that a single-storey solution will prove more costly than a small brick and mortar home. However, the multi-storey solution proves to be feasible when compared to a concrete three-storey structure. Regarding time, the construction of an Intermodal Steel Building Unit (ISBU) home is up to 3 times faster compared to a conventional house. The end-product quality will depend on the quality system used by the contractor and its correct implementation; thus it is not an important dividing factor when comparing conventional versus Alternative Building Technology (ABT) systems. The societal parameter of an ISBU solution rests on its acceptance by the beneficiaries. Traditionally, resistance has met ABT home implementation, as stakeholders consider them as inferior products. A comprehensive survey was carried out in an informal settlement to test this statement. The results show that the majority of beneficiaries prefer conventional homes, unless the ABT home resembles its conventional counterpart. The environmental sustainability of a new product relies primarily on the carbon footprint of the materials and methods used. This was tested by comparing the impact of an ISBU solution with a conventional solution. The “upcycling” (as opposed to recycling) of used containers provides a large environmental benefit when comparing it to newly constructed brick for conventional homes, and thus the impact is lower. The findings of the study show that a single-storey solution utilising containers proves ineffective, as it is more expensive per square meter than a conventional home. However, a multi-storey container solution is feasible, as it is lower in cost (than comparative conventional solutions), faster to construct, allows for higher density expansion of settlements and is more environmentally friendly. / AFRIKAANSE OPSOMMING: Die enorme behuisingsagterstand van informele nedersetters in Suid-Afrika skep 'n geweldige uitdaging vir die rolspelers in die formele behuisingsektor. Huidige navorsing toon dat hierdie agterstand nie vinnig genoeg verminder nie, en baie mense verkeer in nood. Die meerderheid van huise wat opgerig is sedert 1994 maak gebruik van konvensionele baksteen en sement konstruksie, terwyl alternatiewe maniere van konstruksie 'n nietige aandeel het. Die doel van hierdie studie is om die bruikbaarheid van skeepshouer-gebaseerde huise te bepaal in teenstelling met konvensionele baksteen en sement huise, spesifiek vir die lae-koste behuisingsgeval in Suid-Afrika. Dit word uitgevoer volgens die "drietallige beperking" beginsel van projekbestuur, naamlik koste, tyd en kwaliteit parameters. Addisioneel word die sosiale aanvaarbaarheid sowel as die omgewingsvriendelikheid van die konsep getoets teen konvensionele maniere van konstruksie. Hierdie parameters vorm saam die “drie pilare van volhoubaarheid”, wat betrekking het tot ekonomiese-, sosiale- en omgewings-aspekte. Twee toetsgevalle is ontwerp volgens argitektoniese en tegniese standaarde sowel as gemeenskap benodigdhede. Die eerste geval is ontwerp as 'n enkel-verdieping huis, met behulp van modulêre skeepshouers. Die tweede geval is 'n meertallige-verdieping, medium-digtheid residensiële gebou wat verskeie families kan huisves. Die toetsgevalle modelleer verskeie skeepshouer oplossings, terwyl konvensionele konstruksie oplossings dien as beheer gevalle. Elke geval word volgens die drie volhoubaarheids beginsels getoets, met die beheer gevalle wat dien as die teen-prestasie voorbeelde. Die vergelyking van die ekonomiese parameter berus op die koste van elke ontwerp, sy konstruksietyd en die eindproduk kwaliteit. Die lys van hoeveelhede is gemeet teen dié van ʼn konvensionele huis, en daar is bevind dat die enkelverdieping skeepshouer-geval veel duurder sal wees. Die meertallige-verdieping geval aan die ander kant, maak gebruik van baie kostebesparings metodes, en lyk uitvoerbaar. Die tyd-aspek wys dat die konstruksie m.b.v. “Intermodal Steel Building Units” (ISBUs) tot en met 3 keer vinniger te wees teenoor ʼn konvensionele huis. Die eindproduk kwaliteit hang af van die tipe kwaliteit stelsel wat die kontrakteur gebruik, sowel as die korrekte toepassing van hierdie stelsel; dus is dit nie ʼn skeidende faktor tussen alternatiewe en konvensionele boumetodes nie. Die gemeenskaplike aspek van die gebruik van alternatiewe konstruksie berus op die aanvaarding van die huisbewoners. Gemeenskappe het tradisioneel nie ʼn hoë dunk van Alternatiewe Bou-Tegnologie (ABT) behuising nie, aangesien hulle dit as swak kwaliteit bestempel. Om hierdie stelling te toets is ʼn opname uitgevoer in ʼn informele nedersetting. Die resultate wys dat die meerderheid inwoners die konvensionele opsie verkies. Daar is wel bevind dat die inwoners ʼn ISBU huis sal oorweeg indien dit ʼn visuele ooreenkoms toon met ʼn konvensionele huis. Die omgewingsvolhoubaarheid van ʼn nuwe produk berus hoofsaaklik op die koolstof-voetspoor van die materiale en boumetodes wat gebruik is. Hierdie aspek is getoets deur ʼn ISBU oplossing se omgewings-impak te meet teen dié van ʼn konvensionele huis. Die “upcycling” voordeel wat skeepshouers gebruik gee ʼn groot voordeel teenoor die konstruksie van konvensionele huise, siende dat min nuwe materiale gebruik word. Dus is die totale omgewings impak laer as die van ʼn konvensionele huis. Die bevindinge van die navorsing wys dat ʼn enkelverdieping ISBU oplossing onprakties is in terme van koste per vierkante meter, aangesien dit veel duurder as ʼn konvensionele metode is. Die meertallige-verdieping geval is wel uitvoerbaar, aangesien dit ʼn laer koste tot gevolg het, vinniger gebou word, hoër-digtheid behuising bevorder en meer omgewings-vriendelik is.

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Vid entreprenader förekommer ett begrepp som kallas ÄTA (Ändringsarbete, Tilläggsarbete och Avgående arbete). Ett ÄTA-arbete uppstår när beställaren under entreprenadtidens gång föreskriver något som inte är angivet i kontraktshandlingarna. ÄTA är dessutom beställarens garanti för att dennes önskemål med investeringen blir som det är tänkt. Entreprenören är vid sådana tillfällen både berättigad och skyldig att utföra dessa ÄTA-arbeten mot ersättning. Detta står att läsa i standardavtalen AB 04 och ABT 06 som entreprenadavtalen ofta grundas på.1 När det kommer till entreprenörens rätt att erhålla betalning för arbeten som denne anser inte ingår i kontraktsarbetena kallas det för ”arbeten likställda med ÄTA-arbeten” (vidare kallat likställda arbeten). Den bestämmelsen återfinns i 2:4 i standardavtalen.  Regleringen gällande likställda arbeten verkar till synes väldigt genomtänkt och belyst av upphovsmännen i föreningen Byggandets kontraktskommité (BKK). Det har dock visat sig att den bestämmelse som skapats för att råda bot på eventuella problem när verkligheten avviker från det förmodade, inte sällan vållar meningsskiljaktigheter mellan parterna. Samtidigt som entreprenören vill ha extra betalt för arbeten som inte står med i kontraktet, så ligger det i beställarens intresse att betala så lite som möjligt utöver kontraktssumman. En fråga som väckt min nyfikenhet är hur en tvist om betalning för likställda arbeten kan bli så omfattande och handla om ett belopp om 21 miljoner kronor som i NJA 2015 s. 3.2 Informerade entreprenören inte beställaren om att de ansåg att det förelåg ett likställt arbete? Inhämtade entreprenören beställarens synpunkter, som i sin tur förklarade att de var av en annan åsikt? I händelse av det senare, varför fortsatte entreprenören att utföra likställda arbeten vid äventyr av att inte erhålla betalning? Eller har entreprenören inhämtat beställarens synpunkter utan att erhålla ett positivt svar av beställaren men valt att fortsätta ändå för att senare tvista om saken?  Hade det inte varit en mindre riskabel lösning för entreprenören att häva kontraktet i stället för att riskera att arbeta utan att erhålla betalning? Det känns i sammanhanget som att entreprenören står för en större del av riskerna när det kommer till de likställda arbetena och kostnaderna som uppstår. Under den senaste 15-årsperioden då AB 04 och ABT 06 varit gällande har BKK genom de nu gällande standardavtalen, och Högsta domstolen (HD) med sina prejudicerande domar, fastställt hur de grundläggande begreppen och rekvisiten ska tolkas när det gäller regeln om likställda arbeten i 2:4 och framförallt frågor om hur de här aktuella bestämmelserna i kapitel 2 i standardavtalen ska tolkas.  Uppsatsen handlar således om likställda arbeten och problematiken kring det begreppet.