SADM 7/ed – CTTS CASE STUDY - Milestone 1: Scope Definition Page: 1-6 Peter: Anna: Peter: Anna: Peter: Systems have a way of doing that. That's why we design first and build second. Anna, I'd like to turn the design of this project over to you. Thank you. I was hoping you'd say that. I've already been thinking about how the data would look and some of the programming routines we would need. Don't jump into implementing it yet. Design first, build second. Sorry. I guess I’m excited. This will be the first full application I’ve designed and built from the ground up. Yes, and it will be a high profile system both to us and to our clients. This will help us keep our clients satisfied. It is hard to put a dollar figure on that without knowing more about what the current problems cost us in terms of lost or dissatisfied clients. But if we can make clients happier, it will surely payoff. Where do we start? The first step is to prepare a formal Request for System Services to request the investigation of a system development project. I'd also like you to do a Problem Statement Matrix. Do we have to do that even when we are requesting our own services? I mean this system is for our own use. Yes, we do. We have to justify our allocation of human resources to this project as opposed to projects than generate client billings. How long do you think it will take you to complete the project? I wouldn’t know how to begin to estimate it. It comes with experience. But you have some experience already from working on your other projects. How does this one compare in terms of complexity of the data? My original ideas could have been implemented with a pretty simple data structure. The PC components and the request tracking makes it more complex. I guess it is about twice as complex as the shopping cart application I wrote. So where does all that lead you in terms of a ballpark estimate? I’ll say six months for now. But that is very rough. I would need to look at it more closely to be sure. Exactly. That is why we design first and build second. Use six months as your initial estimate. Then we’ll see what the Problem Statement Matrix and the Request for System Services say before we start investing any serious time in this. OK. You're the boss, Boss. I'll get right on it. Anna: Peter: Anna: Peter: Anna: Peter: Anna: Peter: Anna: Peter: Anna: Prepared by Gary B. Randolph for
Systems Analysis & Design Methods 7ed
by J. L. Whitten, L. D. Bentley, & K. C. Dittman
Copyright Irwin/McGraw-Hill 2007
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