BP-E.1: Design for maintainability

This practice spans two phases of the project: development and maintenance.

The practice applies to all projects, but in particular to the ones that are expected to be maintained in the long term.

5.1. Planning and designing for maintainability

1. Monitor measures of maintainability for the product
   
   1. Consider using technical debt as the primary measure of maintainability
   2. Assign responsibility for monitoring the maintainability
   3. Provide training on writing maintainable code to the team members
   4. Report, manage and handle the issues related to maintainability
2. Iteratively refactor the product
   
   1. Allocate time (preferably, in each development cycle) for managing the technical debt and code refactoring
   2. Provide training on refactoring to the team members

1. Maintainability is not measured or the product is not refactored regularly
   
   1. The project becomes unmaintainable
   2. Technical debt increases
   3. Development of new features and fixing defects requires more and more effort