case module create a context d iagram to help the programmers understand how information is flowing through the proposed system u se the notes fr om the jad session which have identified the entities and processes and you can use this information 3

Hopefully, you are not too bogged down with the DFD. The owner and store manager met this morning and came up with some new rules that will need to be implemented in the SIM system:

  • The owner and store manager have decided to offer customers a service plan were they pay a flat rate once a year. With this plan, customers only pay for the cost of parts when they have their appliance(s) serviced. They can only buy a service plan if they have purchased an appliance from Appliance Warehouse.
  • With this new service plan, if they have service on their appliance more than 3 times during the year, they will have to pay the full amount of the service fee and cost of parts.
  • If the customer does not buy a service plan but buys their appliance from us, we will give a 20% discount off the service fee for the life of their appliance.
  • Everyone else will pay the full cost of the service plan and parts cost.

Create a decision table from these rules. I would like to see your first pass at this by our next scheduled meeting.

Nice work on the decision table! Now you’ll need to simplify the decision table so that you can create a decision tree. The programmers find it very helpful to have all the decisions laid out in a decision tree.



You should create a Data Flow Diagram (DFD). This diagram will help the programmers understand how information is flowing through the proposed system. I suggest that you use the notes from the JAD session. They have identified the entities and processes and you can use this information to create a context diagram.

 
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