1 Planning includes Identification and Selection and Initiation and Planning 2

1 planning includes identification and selection and

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(1) Planning (includes Identification and Selection and Initiation and Planning) (2) Analysis (3) Design (4) Development (5) Testing (6) Implementation (7) Maintenance don’t look at the number of steps , but look at what happens in each step on the test, stick to one system (don’t mix and match steps)
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Analysis of Dr. D’s SDLC Identification and Planning – Step 1 Business drives the technology Need to identify key needs and select specific solutions Make sure to look at problems , not symptoms Initiation and Planning – Step 2 One we decide what we’re doing for the term, how much capital, people, etc. do I need? Find the ballpark figures (don’t necessarily need specifics): o 1 year-ish or 2 weeks-ish? o 20 people or only 3? o 1 million dollars-ish or 10,000-ish? Make sure the project is aligned with the company Be wary of business politics Analysis – Step 3 This is where you will make or break a career This is what companies notice Cause / effect, separation of components, etc. Look outside the box: don’t forget you are a part of a larger system Do your research, and make sure you think of all possible outcomes Design – Step 4 Make a product Implementation – Step 5 You may have a perfect pan and the perfect project, but it just doesn’t work If you make a mistake in a previous step, you’ll find it here Maintenance and Review – Step 6 Just building the system isn’t enough Think of a car… just buying it isn’t enough o Gas, insurance, cleaning, etc. Review: did what we thought would happen actually happen? o How could we have done this better? o What went wrong? PROTOTYPING Prototyping is a category of methodology; it’s used because often times people need to see to believe
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o It is cyclical and interactive o The goal is to push something out quickly, see if you’re on the right track, then make a change o 1 st delivered is a prototype (rough draft), not It uses the same steps as the Traditional SDLC, but is formatted differently: o The Analyze, Design, and Implementation stages form a three part cycle in the middle of the SDLC o Identification + Selection and Initiation + Planning still come before the cycle, and Maintenance and Review still comes after A prototype, or proof of concept, is thrown away; it isn’t part of the final solution o Ex. Models o Used to prove that something can be done o Often used to sell a product Evolutionary model o Specific kind of prototype that becomes part of the final product o Ex. Some sort of mechanical part that is re-welded to work at the end Problems with Prototyping Leads people to think the system will come sooner than it will Avoidance in creating formal documentation (goes with point below) Lack of testing (goes with point above) Project is often hard to terminate No indication of performance in operational conditions Company resources not often used efficiently (goes with point below) Don’t usually fit well with other corporate systems (goes with point above) o Normally a stand alone project Traditional SDLC Prototyping linear interactive / cyclical structured less structured rigid flexible
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  • Spring '19
  • Management, Data Management, Entity-relationship model, entity, Database management system, Technology knowledge doubles

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