RAM RAM Life Cycle Cost & Economics 2 — Questions and Answers
Question 1: What is the purpose of a cost-benefit analysis (CBA) in a RAM improvement program?
- To identify the cheapest vendor for spare parts
- To compare the cost of reliability improvements against the economic benefit of reduced failures and downtime (Correct answer)
- To calculate employee salaries in the maintenance department
- To determine the optimal shift schedule for operators
Correct answer: To compare the cost of reliability improvements against the economic benefit of reduced failures and downtime
CBA quantifies whether the investment in reliability improvements yields sufficient savings in failure costs and downtime revenue loss to justify the expenditure.
Question 2: What is Net Present Value (NPV) used for in RAM economic analysis?
- Calculating the nominal price of replacement parts
- Discounting future cost savings and expenses to their equivalent value in today's dollars (Correct answer)
- Measuring the physical weight of spare parts inventory
- Tracking the number of failures per year
Correct answer: Discounting future cost savings and expenses to their equivalent value in today's dollars
NPV converts all future RAM-related cash flows—savings, costs, investments—to present-day value so decision-makers can compare alternatives on equal economic footing.
Question 3: How does Mean Time Between Maintenance (MTBM) affect life cycle cost?
- A longer MTBM increases total maintenance cost
- A longer MTBM means fewer maintenance events, reducing cumulative labor and parts costs (Correct answer)
- MTBM has no relationship to cost
- A shorter MTBM always lowers LCC by keeping the system well-serviced
Correct answer: A longer MTBM means fewer maintenance events, reducing cumulative labor and parts costs
Extending the interval between maintenance actions reduces the total number of maintenance events over the system's life, cutting associated labor, materials, and downtime costs.
Question 4: Which economic metric expresses reliability improvement value as a percentage return relative to the investment made?
- Net Present Value (NPV)
- Internal Rate of Return (IRR)
- Return on Investment (ROI) (Correct answer)
- Break-even analysis
Correct answer: Return on Investment (ROI)
ROI divides the net benefit of a reliability investment by its cost and expresses the result as a percentage, enabling quick comparison of competing improvement options.
Question 5: What is Total Cost of Ownership (TCO) in the context of RAM?
- Only the purchase price negotiated with the supplier
- The sum of acquisition, operating, maintenance, and disposal costs over the entire system life (Correct answer)
- The annual maintenance budget approved by management
- The cost of spare parts held in inventory
Correct answer: The sum of acquisition, operating, maintenance, and disposal costs over the entire system life
TCO is the comprehensive sum of all costs associated with a system from cradle to grave, making it equivalent to LCC in most RAM frameworks.
Question 6: How does system availability directly impact revenue in production environments?
- Higher availability reduces revenue because more products are made, lowering prices
- Higher availability increases productive uptime, enabling more output and revenue generation (Correct answer)
- Availability has no measurable link to revenue
- Lower availability improves product quality, increasing revenue
Correct answer: Higher availability increases productive uptime, enabling more output and revenue generation
In production systems, every hour of uptime generates output; higher availability translates directly to more production hours and greater revenue or service delivery.
RAM RAM Life Cycle Cost & Economics 2
What is the purpose of a cost-benefit analysis (CBA) in a RAM improvement program?