Re-factoring is the process of modifying existing code to increase performance. The code functionality remains unchanged after refactoring. When designing a sprint, the velocity of the sprint is often estimated using expert judgment based on past data. However, the mathematical method used to calculate sprint velocity is as follows: First - finished narrative points X team capacity: If capacity is measured as a percentage of a 40-hour week Second, completed story points / team capacity: If capacity is measured in man-hours, The second option is appropriate for our circumstances.