One of the exit criteria for a SW project was defined as '80% statement coverage'.
A test manager submitted the following report:
'We did not measure the statement coverage. However, we ensured 80% branch coverage, therefore the exit criteria was met'.
Is the test manager right?

Question

One of the exit criteria for a SW project was defined as '80% statement coverage'.

A test manager submitted the following report:

'We did not measure the statement coverage. However, we ensured 80% branch coverage, therefore the exit criteria was met'.

Is the test manager right?

Andrea Di Giuseppe · Accepted Answer

No There is not direct relationship 80% branch coverage does not guarantee 80% statement coverage

Andrea Di Giuseppe · Answer

Yes. 50% branch coverage guarantees 100% statement coverage. With 80% branch coverage, the exit criteria is easily met.

Andrea Di Giuseppe · Answer

No. The relation works the other way: 80% statement coverage guarantees 80% branch coverage

Andrea Di Giuseppe · Answer

Yes Coverage of 80% of the branches in the control flow guarantees 80% statement coverage

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