Table 5. Estimation of time needed to execute the following scenarios.

Scenario	Estimated time using an ETL tool	Estimated time using ETLCL
1. (a)	8 man-hours	1 man-hour
1. (b)	16 man-hours	2 man-hours
1. (c)	16 man-hours	2 man-hours
1. (d)	This scenario is not usually supported by ETL tools	Performed by the engine for an very short amount of time
1. (e)	On demand—it depends on the operation team	10 man—minutes
1. (f)	1 man-hour	10 man—minutes
2.	No more than two man-days	No more than 2 man-hours
3.	N/A	No more than 3 man-hours