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Dear JSON , example is fillled in the sheet. I evalute the same. In cell no B7 figure is shown 7 it means that seven employees are needed in A shift. Therefore A is written from B2 to J2 it menas that employees D,E,F,G,H,I and J shall come in A shift.
2. Working remains for 24x7x365 days so 4 or 5 employees get weekly off on each day.
3. Shift change occurs per week not day by day. Your example is correct.