To meet the fast-change market, products have to be improved continuously through design change processes. The design change process is the most frequent activity in its life cycle. When a change for a design is initiated, its related components need to be changed and that results in the changes of other related components. This starts a chain reaction. The product data usually include the data that may be generated throughout its life cycle, such as the design chart, manufacturing/production information, user¡¦s information, etc. The data formats varied at each stage of the product and its amount is too large for a simple database to handle. We need a system to manage these data which is called a Product Data Management¡]PDM¡^system. When a chain reaction occurs, it may cause a series changes among enterprises. We need a method to constrain the affected domain, and provide necessary data to proceed the change process. In this research, we are dealing with the design change issues by sharing product information stored in PDM systems. The purpose of this research is to construct a product data-sharing framework so that design change process can be carried out through the computer network. A product data search engine¡]PDES¡^will be used as the core of this framework. The PDES consists of several algorithms and assembly rules. The major function of the PDES is to find out proper parts, and then get their data through the network to meet the design change requirements. The design change processes are usually result in decision-making problems caused by distributed data and inconsistency of data formats. These problems can be solved by the proposed framework. The configurations of a personal computer and a bicycle are used as examples to demonstrate the analysis and modeling procedures.

It is widely accepted that design changes, occurring during construction projects, can account for a significant proportion of the engineering design consultant’s total cost. Projects with multidisciplinary, distributed and virtual project teams, working on technically challenging problems, make the impact of design changes increasingly difficult to predict. Existing guidance suggests ‘best practice’ protocols for recording, reporting and communicating design changes. However, best practice protocols do not provide guidance for predicting the impact in terms of project cost and duration. Impact assessments are essential in the decision to implement changes and subsequently being in a position to justify fee claims to clients. Decisions in the construction process are normally based on experience and professional knowledge of practitioners, such as architects, engineers, project managers and contractors. There is evidence, however, that, in design management, sharing of professional knowledge tends to be tacit and socially constructed (where team members draw on their own experience and the experience of those around them). Although practitioner experience and intuition is invaluable in determining the impact of a design change, this research is based on the position that a more structured process is required. It is argued that a software based approach, to better inform practitioners’ existing knowledge, is required to improve the quality and accuracy of impact assessments. The current practice for managing and assessing change was examined through studying the operations of the case study organisation, undertaking a literature review and conducting interviews with representatives from organisations in other industries. A new project management tool was then developed which provides support for practitioners to make better-informed impact assessments. This is achieved through providing: (a) a process map to visualise rework, (b) instant access to previous similar impact assessments and (c) an embedded, standardised method for knowledge sharing. The concept for this tool was developed by combining appropriate techniques and tools found in the design management and knowledge management literature. Users are further encouraged to use the software tool through a system to automate the updating of Microsoft Project schedules, thus eliminating time currently spent scheduling rework. The validation and verification stages consisted of formal interviews with potential users and preliminary user testing. Regular feedback on the support tool was obtained from a wide range of peers and potential users and this was then used to develop its functionality. Positive feedback has included comments about the concept of the tool, user-friendliness and need for implementation.

The speed of launching new products will accelerate and so the complexity of products and productions systems (Sorli et al 2006; Windt et al., 2008). Change is a natural effect of product development and it offers opportunities to develop the related production (Jarratt et al, 2011; Lager, 2002). To increase the launching, simultaneous development projects with a multi-project structure can be initiated (Araszkiewicz, 2017). This results in transmitted design changes from the product development project into the related production development project. In turn, the production development project needs to manage these transmitted design changes.  The study has investigated how transmitted design changes shall be managed in production development projects. This was performed by exploring theoretical fields of Engineering Change and Project Management and collecting empirical data from a studied complex production development project at Scania DT.  A standardized Transmitted Design Change process is recommended to use in order to achieve better communication in-between the interdependent projects and manage change with respect to risk and without harming other processes. Furthermore, project management methodologies and its characteristics were discussed in order to support and facilitate the management of transmitted design changes. The study concludes that both flexible and traditional project management methodologies shall be adopted in these complex development projects with high levels of interdependencies. The combined strategy supports changes and uncertainties with flexible iterations and controls the projects with standardized processes and structure.

This master thesis deals with creation computional model of specific door leaf which was researched and now is provided by company named IFE-CR, a.s. Finite element method analysis is performed within the standards for load conditions during the operation. Stress-strain response should be the main factor to comparing results with experiment on real door. Based on acquired knowledge from the original model we can evaluate credibility of mechanical behavior of newly designed model which has lower profil tapered from the original 42 mm to 25,4 mm. From the results of FEM analysis of the modified profile is evaluated applicability to the real operational state. At the end is quantified material and financial savings achieved by reducing the height of profile.