Design Features | Logical | Physical |
What the model depicts | How the business operates | How the system will be implemented (or how the current system operates) |
What the processes represent | Business activities | Programs, program modules, and manual processes |
What the data stores represent | Collections of data, regardless of how the data is stored | Physical files and databases, manual files |
Type of data stores | Show data stores representing permanent data collections | Master files, transaction files. Any processes that operate at two different times must be connected by a data store. |
Systems controls | Show business controls | Show controls for validating input data, for obtaining a record (record found status), for ensuring successful completion of a process, and for system security (i.e. journal records) |
Exercises (pg. 273): Problems #1, 4(due - noon Oct. 20, 1998)
e-mail your answers to summers_wayne@ColumbusState.edu
Explore the MRE HyperCase company and e-mail the answers to the questions on page 272[This can be done in a group of 2-3]