85% of errors can be fixed in a few hours

Research Finding:
About 85% of errors can be fixed in a few hours if caught in the development stage.

Sources:

Cover of Journal of Systems and Software Evaluating Software Development by Error Analysis: The Data from the Architecture Research Facility
Cover of Journal of Systems and Software Collecting and Categorizing Software Error Data in an Industrial Environment
Cover of Practical Software Metrics for Project Management and Process Improvement Practical Software Metrics for Project Management and Process Improvement