How is a net present value profile used to compare projects? What causes conflicts in the ranking

Question:

How is a profile used to compare projects? What causes conflicts in the ranking of projects via and internal rate of return?

Net Present Value
What is NPV? The net present value is an important tool for capital budgeting decision to assess that an investment in a project is worthwhile or not? The net present value of a project is calculated before taking up the investment decision at...