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Five plays A, B, C, D and E are to be staged from Monday to Friday of a week. On each day, only one play will be staged. D or E should not be either the first or last to be staged. E should be immediately followed by C. B should be staged immediately after D. One play is staged between A and B.
This is a scheduling LR set. We begin by constructing a table to represent the schedule.
We are told that D or E should not be either the first or last to be staged, so they can't be on Monday or Friday.
Next, we are told that E should be immediately followed by C, and B should be staged immediately after D. So, we get two blocks, EC and DB.
There is only one play between A and B . So it can be DB_A or ADB. If there is one play between B and A and A is screen after B, then in the blank either C or E has to come, but in that case they will not be immediately following each other. Hence the only possible block is ADB.
Now. EC cant be before ADB , as E cant be first, so the order has to be ADBEC.
Putting this in table we have,
So, we have the first play to be staged is A.
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