Answer the 3 questions below based on the DRE table given.

Phase of Origin
Phase Found		Req	Des	Code	UT	IT	ST	Field	Total	Cum
	Req	4							4	4
	Des	1	17						18	22
	Code	1	4	52					57	79
	UT	1	1	6	1				9	88
	IT	2	14	25	2	5			48	136
	ST	9	24	6	1	1	42		83	219
	Field	37	15	11	1	3	14	1	82	301
	Total	55	75	100	5	9	56	1	301
	Cum	55	130	230	235	244	300	301
	(Illustrative example, not real data)

1) What is the Defect Removal Effectiveness (DRE) for the Requirements and the Implementation (coding) Phase?

2) How effective are design inspections at making sure that design defects are contained in the phase, that is, detected soon after they are created?

3) If the code size is 250 KLOC, what is the injection rate for coding defects?