Code Churn or Code Rework is a metric that measures the amount of code that is changed or deleted during a specific period of time. It is used to measure the maintainability and stability of the codebase and to identify areas where the code may be overly complex or hard to understand.
The formula for Code Churn or Code Rework is:
Code Churn or Code Rework = (Number of Lines of Code Changed or Deleted / Total Number of Lines of Code) * 100%
It is calculated by measuring the number of lines of code that were changed or deleted during a specific period of time and dividing that by the total number of lines of code in the software. The result is then multiplied by 100% to express the result as a percentage.
For example, if a software has 10000 lines of code and 2000 lines of code were changed or deleted during a month, the code churn would be 20%.
It’s important to track the code churn or code rework over time, compare it against industry benchmarks, and track it by different segments, such as by different teams, products, or customers, in order to identify where the problem is and take action to reduce the code churn.
It’s also important to keep in mind that code churn or code rework can be caused by many factors, such as fixing bugs, adding new features, or refactoring the code, and it’s important to understand the reasons behind the code churn and take the appropriate actions accordingly.
It’s also important to note that high code churn or code rework is not always a bad thing, it can be the result of an active development process, and it’s important to measure it in conjunction with other metrics such as the number of defects found and the quality of the codebase.
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