The Evolving Product and/or Service Requirement
John Longshore, Angela L. Cheatham, Jim Gibson · Productivity Press eBooks · 2023
This chapter will act as a pivot for the reader. They will be placed in the realm of the systems development life-cycle process, which is the basis for new or redesigned products and/or services and presented with how defining those system requirements drives functional supportability elements and packaging. The chapter presents the reader with a real-world Systems Acquisition case study , which would serve as a thread throughout Chapters 7 , 8 , and 9 . It requires the reader to assess a chosen system by selected functional supportability elements and how they should be prioritized and packaged during its forecasted operational life-cycle. Because the prioritizing and packaging of those elements requires an understanding of how they were initially conceptualized and architected during each of the systems life-cycle phases, a structured process by which all functional supportability elements are planned, assessed, and measured during each life-cycle phase starting with conception and ending in retirement is conducted using a QFD (Quality Function Deployment) Life-Cycle Modeling methodology. Understanding the need for the system is initially addressed. It then leads the reader through a discussion of critical starting questions that require addressing as an initial step in defining requirements. The chapter then illustrates to the reader, through a QFD Life-Cycle Modeling methodology, how environmental development criteria affect the conceptualization of the overall system. It then addresses how this same QFD Life-Cycle Modeling methodology is used to aid in evaluating the rate of use, and support infrastructure as a basis for the product and/or services supportability requirements study. The chapter concludes with reference to the assessment criteria of performance, support, and cost of ownership and reiterates that the overarching goal during all phases of system development is attaining a balance between each criterion.