End of Scene 5.0 Scene 5 Manager walks into counter office where a clerk is adju

Question

End of Scene 5.0 Scene 5 Manager walks into counter office where a clerk is adjusting records, he tells cleric that the monthly meeting is coining up and he needs some new reports. They are :- due to anincreasein disagreements an analysis of disagreements is required for the past 3 years to look for any pattern, first by owner (recurring names) then by area, by furnished' unfurnished properties, by bond amount, also analyses percentage in owners' and therefore also the renters' favour. the average percentage increase in bonds for the past three years, in respect of the same prop erty and overall. Are some owners increasing the bond and therefore their rents not according to the rest of the market. a print out of properties by area i.e. postcode. Cleric asks if the old reports are still required and checks them off :- Total Bond Holding at the end of this month. Total Bonds being held because of disagreement No of properties, no of owners, no of properties breakdown into owners owning 1,2,3 or more properties Total monies paid and received this month Total of uncashed cheques- for both renters and owners-the opposite o f b ad debts. Manager replies 'yes'. End of Scene

Explanation / Answer

Data Flow Diagrams (DFD) help us in identifying existing business processes. It is a technique we benefit from particularly before we go through business process re-engineering. At its simplest, a data flow diagram looks at how data flows through a system. It concerns things like where the data will come from and go to as well as where it will be stored. But you won't find information about the processing timing (e.g. whether the processes happen in sequence or in parallel). We usually begin with drawing a context diagram, a simple representation of the whole system. To elaborate further from that, we drill down to a level 1 diagram with additional information about the major functions of the system. This could continue to evolve to become a level 2 diagram when further analysis is required. Progression to level 3, 4 and so on is possible but anything beyond level 3 is not very common. Please bear in mind that the level of detail asked for depends on your process change plan. Diagram Notations Now we'd like to briefly introduce to you a few diagram notations which you'll see in the tutorial below. External Entity An external entity is where a data flow comes from or goes to, which is outside what we are currently focusing to study in terms of the business process. Process A process represents manipulation in which data flow is being worked on. Data Store A data store is a place where data is held. Data Flow A data flow shows a flow of information going from its source to its destination.

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