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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