Thanks ajay, but i will re put my question I have values from cell A1:A100 which is actually the hours reqired to fabricate certain items. In another cell C1 i have a fixed value say 200 whic is total hours the x number of people will work in day. Now in B2 i will make a formula =sum($A$1:A2) and i will copy this formula upto B100. Now i will check the results in the column B. The cell from from where the value is greater than the value in C1, i want the formula to change from that cell. For example if the value in B5 is greater than the value in C1 i want to change the formula as =sum($B$5:B6). In short cell B1:B5 have fulfilled the required hours in a day. So i want to calculate the required hours for the next day. So my question is how can i change my range of sum when the criteria is achieved..

Everything is nice, bar the group of functions related to selection of specific cells. This group of functions is virtually non-working and nearly always returns the "No cells qualify" message, whatever the criterion. I wonder why this is so.