The document discusses capital budgeting techniques used to evaluate potential large investments. It describes the payback period method and average rate of return method. The payback period method calculates the number of years for the initial investment to be paid back from cash inflows. The average rate of return method calculates the average annual accounting profit as a percentage of the average investment over the project's lifetime. The document provides examples of calculating payback periods and average rates of return for projects using both straight-line and written down depreciation methods. It outlines the rules for accepting or rejecting projects based on whether the payback period or rate of return meets requirements.