A customer calls HTH to request a home repair job:


A.      A customer calls HTH to request a home repair job:
         Details about the customer and the requested job need to be recorded. (2 marks)
 
B.      Each tradesperson specialises in only one trade, and details of their trade and the date acquired need to be kept on record. (2 marks)

 
C.      HTH has several trucks (including equipment) and allocates a truck for each tradesperson to do a job. Although some tradespersons have their own truck and equipment and advise HTH about this, so not to be assigned a truck. (2 marks)

 
D.      A requested job may require different specialisation depending on the job type – that is, a job may require more than one tradesperson to complete. (4 marks)

 
E.      At a later interview with the manager you learnt that HTH appoint one of the tradespersons to supervise others and oversee the work done by the other tradespersons. (1 marks).

 
F.      Also HTH wants to keep records of how the customer was referred to them – by what source (ie- TV add, Friend, Internet, etc.) (2 marks).
 
G.      Customers have the option to make partial payments for a service, as long as they pay no later than one week after the completion of any service — Details about each payment relating to a service, amount of payment and date need to be recorded. (2 marks)
 

 
Your task
Create an ERD for each of the above statements that describe the current business rules for HTH. For each new statement being the business rule, extend the ERD to include the additional business rule in the ERD (created in previous point   for example; B will include A&B, C will include A, B & C, etc.)


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