When Should an Iteration Be Extended?
Extending an Iteration Is Usually Done Just So the Team Can Feel They Finished. That Is the Wrong Behavior – the Team Needs to Know They Did Not Succeed in...
Extending an iteration is usually done just so the team can feel they finished. That is the wrong behavior – the team needs to know they did NOT succeed in this case! Velocity is based on the amount of work completed in an iteration.
Can we extend sprint time?
The Sprint length should remain predictable. In the real world, it's occasionally necessary to make a Sprint shorter, move end-of-Sprint events up, or reduce the volume of work planned for the iteration. However, you should never extend a Sprint in order to accomplish more work.
How long is an iteration in safe?
Iterations are the basic building block of Agile development. Each iteration is a standard, fixed-length timebox, where Agile Teams deliver incremental value in the form of working, tested software and systems. The recommended duration of the timebox is two weeks.