Cash flow fundamentals — select the correct statements Which statements best describe cash flow concepts and the end-of-period convention used in time value analysis?

Introduction / Context:
Time value of money relies on mapping cash flows to a timeline and discounting or compounding accordingly. Clear definitions and conventions simplify calculations, comparisons, and communication among engineers and financial analysts.

Given Data / Assumptions:

• Interest periods are uniform unless stated otherwise.
• Cash flow signs: positive for receipts, negative for disbursements.
• End-of-period convention is used unless a beginning-of-period (annuity due) is specified.

Concept / Approach:
Defining cash flows precisely avoids double-counting and misplacement errors on the timeline. The end-of-period convention standardizes timing so present worth and future worth formulas are applied consistently. Diagrams help frame knowns, unknowns, and relationships before calculation.

Step-by-Step Solution:
Identify the nature of cash flows: streams of receipts/disbursements over time.Apply the convention: place routine payments at the end of each period unless otherwise stated.Use a cash flow diagram to visualize amounts at specific times (0, 1, 2, …, n).State what is given (amounts, rate, periods) and what must be found (PW, FW, IRR, etc.).

Verification / Alternative check:
Worked examples universally start with a cash flow diagram, then choose PW/FW/annual worth methods consistent with timing assumptions.

Why Other Options Are Wrong:
Options a–d are all correct individually; therefore the correct comprehensive choice is “All of the above”.

Common Pitfalls:

• Mixing end-of-period and beginning-of-period assumptions mid-problem.
• Forgetting sign convention, which flips PW/NPV results.

Final Answer:
All of the above.