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  Code Reviews

Introduction to Code Reviews

Because the design description helps  you to code and documents each program components, your  program reflects your interpretation  of the design. The documentation explain in words and pictures what  the program is supposed to be in the code. Thus it is helpful  to ask an objective group of experts  to review both  your code and  its  documentation  for misunderstandings, inconsistencies, and other faults. This  process is known  as code review and it is  similar  to the  requirement and design  reviews.  

Code  reviews  are designed  to detect defects  that  originate during  the coding  process, although  they  can also  detect defects in detailed design. However it is  unlikely that  reviews will  reveal errors in system  design or requirements. For  the code review a team  is formed composed of the programmer and three or four other technical experts the team studies the program in an organized way to look  for  faults. The technical  experts can be other programmers, designers technical writers or project supervisors but the  code review team contains  no one from  the customer organization. Customer express requirements and approve the proposed design. They are interested in implementation only  when  we can demonstrate that  the system as a whole works according  to their  description. Two  types of code reviews are there:

Code Walk thoughts

Code Inspections

1. Code Walk Thoughts

In the code walk through one presents his code and accompanying documentation to the review team and the team comments on their correctness. During  the walk  through the  discussion is held and time to time controlled. The atmosphere is informal and the focus of attention is on the code not the coder. Although supervisory personnel may be present,  the walk  through has no influence on your  performance appraisal consistent with  the general  intent of testing  finding  faults but not necessary fixing  them.

2. Code Inspections

A code inspection  originally introduced by Fagan at IBM is similar  to a walk  through but is  more formal. In  an inspection,  the review team checks the code and documentation  against a prepared list of concerns. For example  the team may examine the definition and use of data types and structures to see if their use is consistent with the design  and with system standards and procedures. The team can review algorithms and computations for their correctness and efficiency. Comments  can be compared wide code to ensure that they are accurate and complete. Similarly the interfaces among components can be checked for correctness.

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