Code Inspections in software testing

An inspection team usually consists of four people. One of the four people plays the role of a moderator. The moderator is expected to be a competent programmer, but he/she is not the author of the program and need not be acquainted with the details of the program. The duties of the moderator include:

1. Distributing materials for scheduling inspections

2. Leading the session,

3. Recording all errors found, and

4. Ensuring that the errors are subsequently corrected

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Hence the moderator may be called as quality-control engineer. The remaining members usually consist of the program’s designer and a test specialist.

The general procedure is that the moderator distributes the program’s listing and design specification to the other participants well in advance of the inspection session. The participants are expected to familiarize themselves with the material prior to the session. During inspection session, two main activities occur:

The programmer is requested to narrate, statement by statement, the logic of the program. During the discourse, questions are raised and pursued to determine if errors exist. Experience has shown that many of the errors discovered are actually found by the programmer, rather than the other team members, during the narration. In other words, the simple act of reading aloud

1. one’s program to an audience seems to be a remarkably effective error-detection technique.

2. The program is analyzed with respect to a checklist of historically common programming errors (such a checklist is discussed in the next section).

It is moderators responsibility to ensure the smooth conduction of the proceedings and that the participants focus their attention on finding errors, not correcting them.

After session, the programmer is given a list of the errors found. The list of errors is also analyzed, categorized, ad used to refine the error checklist to improve the effectiveness of future inspections.

The main benefits of this method are;

1. Identifying early errors,

2. The programmers usually receive feedback concerning his or her programming style and choice of algorithms and programming techniques.

3. Other participants are also gain in similar way by being exposed to another programmer’s errors and programming style.

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The inspection process is a way of identifying early the most error-prone sections of the program, thus allowing one to focus more attention on these sections during the computer based testing processes.

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