short term decision

With the exception of relevant costing, the chapter does not warrant lectures because the exercises are just the application of Paper F2 techniques (which are revised elsewhere in the F5 lectures. Relevant costing is important - there are lectures on this within the 'Revision Lectures' section of the F5 pages on here.

sir what about make or buy decision, outsourcing, further processing decision and shut down decision topics?where can i find the lecture for these topics

I have already answered you. I said that apart for relevant costing it does not warrant lectures, so you will not find lectures!