Exam 5: Process Modeling

Data (like Year-to-date totals)that come from a data store and are used in a process (like 'Calculate YTD Totals')and then the updated amounts are written back to the data store - can be drawn on a DFD model as a two-headed arrow.

Vanessa has a data flow diagram with an item called 'Register for Class'.That item would be:

A data repository is a collection of data that is stored in some way on a DFD.

An external entity is:

What diagram will have processes with one decimal place (like 3.1,3.2,and 3.3)and might have flows coming in (or going out)that are not illustrated?

Many business processes are too complex to be explained in one DFD.

It is possible to decompose level 1 processes even farther,so for example,process 2.1 on a Level 1 DFD might become 2.1A,2.1B,2.1C,etc.

Context diagrams show the entire system in context with the environment (like external entities).

One important principal in process modeling with DFD's is the decomposition on the business processes into a series of DFD's.

A data flow is:

A payroll data flow diagram has a data-store called Accumulated Salary Data.At one stage in the DFD,a process "Calculate YTD-Taxes" gets data from that data store,updates it in the process,and writes it back out.The diagram should show:

A well-constructed use case makes developing a data flow diagram fairly straightforward.

The major inputs and major outputs listed on the use case provide a list of the sources and destinations of the inflows and outflows on the processes on a DFD.

Andrei has a diagram that shows only one process and external entities.He is developing a:

Which Data Flow Diagram shows the entire system with its environment with only one process?

On the context diagram,Tim has a process called "Start the Process".It has one output data flow 'Initial Data' and no input data flows.This is:

Tom is trying to change his Use Case into a Data Flow Diagram.He has found that a use case step generally is the same as a ________ on the Level 1 Data flow diagram.

One end of every data flow will always come from - or go to - a process - with an arrow showing the direction into or out of the process.

On a data flow diagram,there is an arrow called 'student record details'.This would be:

Data that is moving from a process to another process is called a 'data stream'.