Hi guys,
Recently I was struck by a question "HOW MUCH AVERAGE TIME IS REQUIRED TO WRITE A TEST CASE OR TEST STEP FOR ANY APPLICATION. CAN WE HAVE ANY METRICS FOR IT.......
The best thing i can think of to answer your question is make a test plan prior to the implementation stage based on your designs. This way you will have a rough idea of the scale of the testing you'll be doing then just make an estimation of how long that will take. However designs may change over the life of a project.