Hardwood sawmills must become more efficient to remain competitive. One way to increase efficiency and competitiveness is to increase the value or lumber volume produced from logs. While methods to maximize value and volume recovery exist for round logs, little information exists on how to maximize these outcomes for logs with ellipticality. The goal of this research was to determine the impact of low and high degrees of ellipticality on green lumber grade and volume recovery for red oak logs under current sawing methods. Logs of low and high ellipticality were selected and processed at four Appalachian area sawmills. Processing variables and lumber output were tracked for all logs. It was determined that there was no significant difference in overrun, lumber volume, lumber value, and lumber grade between low and high ellipticality logs when comparing the log output at all four sawmills. It was determined that how an individual sawmill processes logs affects the outcome between logs with high and low ellipticality. None of the sawmills produced more value for high elliptical logs than for low elliptical logs and it was possible to produce more lumber volume and value with low elliptical logs. Highly elliptical logs required more processing time than low ellipticality logs in terms of log turns, total elapsed time at the headrig, and number of sawlines at the headrig. The increased processing time results in increased processing costs which were estimated to be $1.28 to $11.33 per log. These costs were not offset by an increase in lumber volume nor lumber value; therefore, highly elliptical sawlogs are less desirable to process than low elliptical logs using current sawing methods. / Master of Science

The ongoing globalization of companies has resulted in a highly competitive business climate where companies have to be cost-effective but still flexible with fast response to customer feedback and present in the international scene. In order to meet the fast paced technological development from the competition and changing demand of the customers, companies focus on creating new products and reducing their time-to-market with an early product launch to gain profits from increased market shares. However, in order to maintain profitability of the new product, it becomes even more important for the company to quickly deploy a full-scale production of the product, also known as the production ramp-up phase. Despite being known as a major cost driver in new product development projects, production ramp-up is a research area which have yet received sparse attention compared to research on product launch and time-to-market in new product development projects. However, with shorter product life-cycles and higher market competition it has resulted in a need to shorten the length of a new product’s ramp-up time without making any trade-off to the cost-effectiveness of the ramp-up project and the end product’s final quality. The study identifies the common problems in volume production of a contract electronics manufacturer and their sources of disturbances from the new product introduction process. It also identifies the factors influencing the new product introduction process at the company and how these factors are connected different sources of disturbances. To identify these findings, a single case study was designed and performed at Orbit One AB, a contract electronics manufacturer with a low-volume production of products. The data collection course was executed in an iterative manner over a period of four months through interviews, observation and internal documentation and was backed up and analyzed with a literature study. The data collection through interviews was carried out in two separate rounds, where the first round of interviews was focused on identifying the common problems in volume production and the second round was focused on the factors influencing the output from the new product introduction process. The discoveries from the interviews were analyzed together with the other sources of collected data to reach a conclusive analysis. The results of the study showed that the most common problems in volume production of the company could be traced to six different sources of disturbances: Product, Production System, Design-Production Interface, Quality, Resource Management, and Personnel. The most common problems could also be summarized as: Problems with manufacturability of product; High variation of process performance, Poor correctness of information, Quality issues with products, and High workload on resources. The factors identified in the findings of the study shows that there are multiple and connected factors which affects the final output of the new product introduction process which corroborates with earlier studies and research in the area of production ramp-up. The study did identify two factors which has not been identified by other ramp-up studies, these were: Lack of organizational project culture and customer flexibility.

In this thesis, the feasibility of deploying RFID technologies in the case of &ldquo / lowvolume high-value&rdquo / products is considered by focusing on the production processes of a real company. First, the processes of the company are examined and associated problems are determined. Accordingly, a simulation of the current situation is constructed by using the discrete event simulation technique, in order to obtain an accurate model. In addition to modeling the current situation, this simulation model provides a flexible platform to analyze different scenarios and their effects on the company production. Next, various scenarios including RFID technology deployment are examined, and their results are compared with respect to profitanalysis which takes into consideration the changes in the production, work in process (WIP) inventory, stockouts, transportation and initial investment. Finally, the analysis of the results and conclusions are given in order to provide guidance for companies with &ldquo / low-volume high-value&rdquo / product portfolios.

This thesis report is the final element of the Master of Science degree in Industrial Design Engineering at Luleå University of Technology, conducted between January and September 2017 at Saab AB Surveillance in Järfälla, Sweden. The purpose of this thesis project was to analyze the current situation inside production of aftermarket products with an aim to create an extensive mapping of the current situation. Resulting in suggestions for improvements to stabilize the production and creating integration between the aftermarket and new production.   Products produced at Saab Järfälla are used in military defense applications where the larger systems in electronic warfare (EW) and countermeasure systems have very long life cycles, i.e. up to 40 years, and are being used in harsh environments. The products have to be maintained through various service agreements to include support with repairs, maintenance, supplies and transports between Saab and the client. One of these service agreements has a demanded net average lead time of N+12 days between Saab’s facilities and the client whereas N days inside the Järfälla production site. Mapping the situation and handling all the product information in a production with high-mix, low-volume characteristics have not been easy. The aftermarket processes inside Järfälla include diagnosing, reparation, assembling and testing to ensure the performance of the products. The aftermarket shares resources with the production of newly manufactured products which is one of the reasons creating a vast difference in the lead times standard deviation. Other reasons such as information handling, priority inference, flexibility issues and bad visual management has been the effect of causing delays in the production.   The thesis project has been conducted through a development process using various methods for mapping the current situation and to come up with new ideas to improve the situation. Starting with a search in available literature and research about HMLV production, aftermarket situations and lean principles, onto using well-known methods for analyzing such as value stream mapping, Ishikawa diagrams and data collection to form a requirement specification for the upcoming solutions.   As a result, in the analysis of the current state, the fact that the processes itself works almost flawlessly shows that causes for delays and lack of stability lies between the operations. Thereby through ideation, evaluation and further development towards the conducted requirement specification, a solution to start with is to make sure the visual management works. A solution creating a complete overview of the production between all operations integrating new products with aftermarket using a new kind of visual production control boards. These visual production control boards will help prioritizing using FIFO queues and daily meetings, seeing capacity demands and troubles easy by stacking station- or areawise and also create an altogether working flow together with the current layout of the production site.   Further recommendations include further development of these visual production control boards together with implementing a CONWIP planning and control principle using wagons, standardize communications and continuously become more transparent inside the company. The proposed solutions might not guarantee N days inside the Järfälla production site but it will help operators, planners and management to easier locate problems and allocate capacity to increase the flexibility of the production. / Detta examensarbete är det sista delen på civilingenjörsprogrammet Teknisk Design vid Luleå tekniska universitet, ett arbete som genomfördes mellan januari och september 2017 hos Saab AB Surveillance i Järfälla, Sverige. Syftet med examensarbete var att utföra en nulägesanalys över eftermarknadsproduktionen för att senare kunna ge förslag på förbättringar och kunna hjälpa till att skapa integration mellan eftermarknadsproduktion och produktionen av nya produkter.   Produkter som produceras av Saab i Järfälla används i militära försvarssammanhang där de större systemen inom elektronisk krigsföring (EW) och motåtgärder har mycket långa livscykler, t.ex. upp till 40 år och används i mycket krävande miljöer. Därmed har produkterna olika omfattande serviceavtal för inkludera support med reparationer, underhåll, leverans och transporter mellan Saab och kund. Ett av dessa serviceavtal kräver en genomsnittlig netto ledtid på N+12 dagar mellan kund och Saab för reparation varav N dagar maximalt hos produktionen i Saab Järfälla. Kartläggningen av situationen och hanteringen av all produktinformation i en produktion med hög variation och låg volym har inte varit lätt. Eftermarknadsprocesserna inom Järfälla inkluderar diagnostisering, reparation, montering och testning för att säkerställa produktens prestanda. Eftermarknaden delar även resurser med produktion av nyframställda produkter vilket är en av anledningarna till att skapa en stor skillnad i ledtidens standardavvikelse. Andra orsaker som informationshantering, prioritetsinferens, flexibilitetsproblem och dålig visuell hantering har medfört förseningar i produktionen.   Projektet har genomförts genom en utvecklingsprocess med olika metoder för att kartlägga den nuvarande situationen och att komma med nya idéer för att förbättra situationen. Det startade med en sökning i tillgänglig litteratur och forskning om HMLV-produktion, eftermarknadssituationer och lean principer, på att använda välkända metoder för att analysera som value stream mapping, Ishikawa diagram och datainsamling för att skapa en kravspecifikation för kommande lösningar.   Som ett resultat visar det faktum att processerna själva fungerar nästan felfritt och att orsakerna till förseningar och bristen på stabilitet ligger istället mellan operationerna. Därigenom genom idégenerering, utvärdering och vidareutveckling mot den genomförda kravspecifikationen, är en lösning till att börja med att se till att den visuella hanteringen fungerar. En framställd lösning som skapar en fullständig översikt över produktionen mellan alla verksamheter som integrerar nya produkter med eftermarknaden med hjälp av en ny typ av visuella produktionsstyrningstavlor. Dessa visuella produktionsstyrningstavlorna kommer att bidra till att hjälpa prioritera genom att använda sig av FIFO-köer och dagliga möten, eftersom kapacitetsbehov och problem är enkla genom att istället stapla station- eller områdesvis och skapa ett helt arbetsflöde tillsammans med produktionsplatsens nuvarande layout.   Ytterligare rekommendationer inkluderar vidareutveckling av dessa visuella produktionsstyrningstavlorna tillsammans med implementering av en CONWIP planerings- och kontrollprincip med hjälp av vagnar, standardisering av kommunikationer och att kontinuerligt bli mer transparenta inom företaget. Lösningarna kan inte helt garantera N dagar på Järfällas produktionsplats, men det kommer att hjälpa operatörer, planerare och ledare att lättare hitta problem och fördela kapacitet för att öka produktionens flexibilitet.