Text D: Implementation and maintenance

The tasks that take place during the implementation phase are: purchase and install hardware and/or software, create and test applications, finalize documentation, convert to new system. When new hardware and software are purchased and installed, they are tested to ensure they operate correctly.

Different types of testing help identify and fix problems. As each application module is completed, it undergoes unit testing. When all modules are tested, integration testing is performed to ensure that the modules operate together correctly. After unit and integration testing are completed, system testing ensures that all hardware and software components work together correctly.

The information system should be completely documented. System documentation describes a system’s features, hardware, and programming. User documentation describes how to interact with the system.

Implementation of a new system must include training employees. It might be software orientation, hardware operations, data entry and backup procedures.

The data for a new information system must be converted and loaded into the new system. System conversion is the process of deactivating an old information system and activating a new one. A final test called acceptance testing demonstrates that the system works correctly.

The maintenance phase involves day-to day operation of the system, making modifications to improve performance, and correcting problems. It is the longest SDLC phase and lasts until the system is retired.

Agree or disagree with the following statements.

1. Testing is the only way to make sure a new information system works.
2. The target audience for user documentation is programmers, designers, and analysts who might maintain the system and implement modifications.
3. When converting data from an existing computer system to a new system, a programmer writes conversion software to read old data and convert it.
4. Acceptance testing includes the use of real data to demonstrate that the system operates correctly under normal and peak data loads.
5. During the maintenance phase, an information system is maintained in a static state and doesn’t undergo any changes.

Find the words with an opposite meaning in the text.

1) to destroy; 2) solution; 3) to sell; 4) to begin; 5) improperly; 6) same; 7) to degrade

<== попередня сторінка	\|	наступна сторінка ==>
Complete these sentences using a noun or a verb from the box.	\|	Text A: Data Modeling

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