Chapter 4- Implementation FlashCards

Front

The purpose of the implementation stage involves programmers producing the code from project documentation and specifications.

Back

Implementation stage involves coding from documentation.

Front

A variety of changeover methods can be employed: parallel, direct, pilot, and phased.

Back

Changeover methods include parallel, direct, pilot, and phased.

Front

Provision of documentation is key to explain the system to end users and provide technical descriptions for future maintenance.

Back

Documentation is essential for user explanation and future maintenance.

Front

Parallel changeover involves operating the old and new systems together using the same data until the new system works correctly.

Back

Parallel changeover runs old and new systems simultaneously.

Front

Advantages of parallel changeover include availability of original system results and use for comparison or backup.

Back

Advantages include access to original results for comparison.

Front

Disadvantages of parallel changeover include duplication of resources and being expensive and time-consuming.

Back

Disadvantages include resource duplication and high costs.

Front

Suitability of parallel changeover

Back

+ If there is a fault with the new system, the old system is available as backup, so bookings are not affected. - There is duplication of effort, extra cost, workload, extra staff, and additional resources needed.

Front

Direct changeover definition

Back

Direct changeover is when the old system is discontinued and the new system replaces it immediately, usually during a quiet processing period.

Front

Advantages of direct changeover

Back

- No duplication of resources or personnel. - The new system is available to everyone at the same time.

Front

Disadvantages of direct changeover

Back

- Very risky: if the new system fails, there is no backup. - There may be a period with no system available.