” (Kamrani & Salhieh 2002, p. The logical groups are research and marketing, planning, scheduling the course of action and manufacturing. These groups are working in a sequential order to accomplish the required production result. The traditionally accepted product development method uses a stepwise execution of activities. Each group will be dependent on the group just above them and should wait for the activity of the previous group to get completed before they start.“A classically linear and sequential approach to software design and systems development, each waterfall stage is assigned to a separate team to ensure greater project and deadline control, important for on-time project delivery.” (Agilecollab n.The output of each logical group is given as input to the next stage. The research results in the ideas of new products which could be marketed successfully. These ideas are sent to the development department for the expansion of the output of market analysis and research. The extended concepts are input to the designing group whose output always is an action plan for the manufacturing department. The following diagram shows the sequential product development process.The pass or execution time is a main factor distinguishing them. The execution time for the sequential developmental process is higher compared to the concurrent engineering method. This is due to the fact that each stage has to wait for the output from the preceding logical group. The concurrent engineering eliminates the requirement of designing an already designed plan. As a result of these advantages the cost of manufacturing becomes much lesser in the case of concurrent engineering procedure, compared to the traditional. The Product Development Processes.
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