A business case is being created for a new.

 An investment appraisal calculation is a technique for assessing whether a proposed business change or solution is financially viable and worthwhile. It helps to compare the costs and benefits of different options and select the best one based on objective criteria. There are different types of investment appraisal calculations, such as payback calculation, net present value, internal rate of return and discounted cash flow. Therefore, option A is the correct answer, as payback calculation is the simplest investment appraisal calculation that considers the tangible costs and benefits of a project, as well as showing when it will have saved as much money as it has cost. Payback calculation measures how long it will take for a project to recover its initial investment by comparing its cumulative cash inflows with its cumulative cash outflows over time. It helps to show how quickly a project will break even or generate profit. Option B is not a correct answer, as net present value is not the simplest investment appraisal calculation that considers only tangible costs and benefits. Net present value measures how much value a project will add or subtract from an organisation by comparing its present value of cash inflows with its present value of cash outflows over time. It helps to show how profitable a project will be in today’s terms. Net present value requires discounting future cash flows using an appropriate discount rate, which adds complexity to the calculation. Option C is not a correct answer, as internal rate of return is not the simplest investment appraisal calculation that considers only tangible costs and benefits. Internal rate of return measures how efficient a project is by calculating its annualised effective compounded return rate or rate of growth over time. It helps to show how attractive a project is compared to other investment opportunities. Internal rate of return requires finding an unknown discount rate that makes net present value equal to zero, which adds complexity to the calculation. Option D is not a correct answer, as discounted cash flow is not an investment appraisal calculation itself, but a method for estimating future cash flows by applying an appropriate discount rate to reflect their present value. Discounted cash flow can be used in other investment appraisal calculations, such as net present value or internal rate of return.

References: BCS Practitioner Certificate in BAP Specimen, page 31.