Life Cycle Cost (LCC)

Life cycle cost (LCC) is the total cost of a defense system over its whole life: research and development, procurement, operating and support, and disposal. Operating and support costs historically account for about 70 percent of a weapon system's life cycle cost, so the purchase price is the smaller part of what a program really costs. Life cycle cost analysis makes the full cost visible before design, acquisition and sustainment decisions are made, while there is still time to change them.

What a DoD life cycle cost estimate includes

A life cycle cost estimate divides total cost into phases and cost elements, called a cost breakdown structure. DoD estimates group costs into the categories below.

Cost category	Typical cost elements	Main cost drivers
Research and development	Concept studies, system design and engineering, prototypes, developmental and operational test and evaluation	Requirements, technology maturity, design choices
Procurement (investment)	Production units, initial spares, support and test equipment, technical data, initial training, facilities	Quantity, production rate, acquisition strategy, initial provisioning
Operating and support	Manpower, unit operations (fuel, energy), maintenance, sustaining support, continuing system improvements, indirect support	Reliability (MTBF), maintenance concept, operating tempo, supply chain and depot structure
Disposal	Demilitarization, decommissioning, hazardous material handling, less any residual or resale value	Regulations, hazardous materials, residual value

The DoD Operating and Support Cost-Estimating Guide, issued by the Office of Cost Assessment and Program Evaluation (CAPE), sets the standard structure for O&S costs. It uses six elements: unit-level manpower, unit operations, maintenance, sustaining support, continuing system improvements and indirect support.

How to calculate life cycle cost

Life cycle cost is the sum of every cost in the cost breakdown structure over the system's service life. Because most O&S costs fall in future years, analysts convert them to present value with a discount rate so that options with different cost profiles can be compared fairly.

LCC = R&D cost + procurement cost + present value of yearly O&S costs + present value of disposal cost − present value of residual value
Present value of a cost in year t = cost ÷ (1 + discount rate)^t

Federal analyses take their discount rates from OMB Circular A-94. NIST Handbook 135 sets out the same present-value method for federal life cycle costing.

Worked example: comparing two options over 20 years

A program compares two options for a system with a 20-year service life. Option B costs 20 percent more to buy but is more reliable, so it needs fewer corrective maintenance actions and fewer spare parts. The figures are illustrative, in $ million per system, discounted at an illustrative 3 percent real rate.

Cost element	Option A	Option B
Procurement	2.00	2.40
Operating and support per year	0.18	0.14
Operating and support over 20 years	3.60	2.80
Disposal (year 20)	0.10	0.10
Life cycle cost, undiscounted	5.70	5.30
Life cycle cost, present value at 3%	4.73	4.54

Option B has the lower life cycle cost: $0.40 million less undiscounted and $0.20 million less in present value. Its higher purchase price is recovered after about 12 years of lower support costs. A price-only evaluation would have chosen Option A. In a real analysis, Opus Suite+ derives the O&S figures from reliability, maintenance and logistics data rather than fixed estimates.

Case study: rubber vs. steel tracks on the CV90

BAE Systems used life cycle cost analysis to compare rubber and steel tracks on the Combat Vehicle 90 (CV90) for its six customer nations. Rubber tracks cost more to buy but greatly reduce vibration and noise, which lowers component failure rates over the vehicle's life. Systecon and BAE Systems experts built a cost structure covering every cost of both options across the full life cycle, using OPUS10, SIMLOX and CATLOC.

The study showed the pros and cons of each track type across different operating scenarios and gave the customer nations a solid basis for their decision. Read the CV90 life cycle cost case study.

Why life cycle cost matters in defense acquisition

Decisions made early in a program lock in most of its long-term cost, often before the system enters production. Later decisions still matter: upgrades, revised maintenance concepts, new product support arrangements and changes in operating tempo all change the remaining life cycle cost. Program managers and product support managers should evaluate any decision that significantly changes these factors for its LCC impact, not only its immediate cost.

LCC analysis also supports source selection. The FAR best-value tradeoff process lets agencies weigh total cost against performance rather than award on lowest price alone, and a structured LCC model gives evaluators a consistent basis for that tradeoff.

Life cycle cost modeling

Life cycle cost modeling is the structured method for building an LCC estimate. A model defines the cost breakdown structure, the parameters and assumptions behind each cost, and the calculations that combine them. Effective models keep traceable links between technical, operational and financial data, so every cost can be explained to reviewers.

O&S cost modeling forecasts operating and support spending across a system's remaining service life. Because O&S is the largest cost category, it is usually where an LCC model delivers the most decision value. The model breaks support cost into its drivers (maintenance activity, spare parts consumption, manpower, support infrastructure and consumables) so each one can be tested against design and sustainment choices.

Sensitivity analysis and scenario modeling

Sensitivity analysis shows which inputs move total cost the most, and scenario modeling tests alternative assumptions side by side. Program teams use both to see how changes in reliability, maintenance concept, operating profile or supply strategy affect life cycle cost and readiness, and to quantify the uncertainty in the estimate.

Life cycle cost guidance and standards

DoD Operating and Support Cost-Estimating Guide (OSD CAPE) defines the standard cost element structure and methods for estimating O&S costs.
GAO Cost Estimating and Assessment Guide (GAO-20-195G) sets out best practices for developing and managing reliable program cost estimates.
OMB Circular A-94 provides the discount rates and principles for benefit-cost and cost-effectiveness analysis of federal programs.
NIST Handbook 135 (Life-Cycle Costing Manual for the Federal Energy Management Program) explains present-value and discounting methods, with a focus on buildings and energy.
IEC 60300-3-3 (Dependability management – Application guide – Life cycle costing) is the main international standard for life cycle costing, used on multinational programs.

How Opus Suite+ supports life cycle cost analysis

Opus Suite+ calculates life cycle cost from the same reliability, maintenance and logistics data used for sustainment and readiness decisions. It combines the capabilities of OPUS10, SIMLOX and CATLOC, Systecon's established optimization, simulation and cost analysis tools, in one environment. Defense organizations use it in every phase of the system life cycle. With Opus Suite+, teams can:

Model and simulate the cost impact of design, maintenance and sustainment decisions
Compare alternative solutions side by side on total life cycle cost
Identify cost drivers and the most cost-effective improvements
Evaluate financial risk and sensitivity to data uncertainty
Support budgeting, POM inputs and forecasting across the program

Cost structures, formulas and KPIs are fully tailorable. A simple model built on rough estimates supports early planning and is refined as better data becomes available. Learn more about integrated logistics support (ILS), readiness-based sparing (RBS) and supportability engineering software.

Frequently asked questions about life cycle cost

What is life cycle cost (LCC)?

Life cycle cost is the total cost of a system over its whole life, including research and development, procurement, operating and support, and disposal. It gives program managers a complete financial picture beyond the purchase price and is used to compare design, acquisition and sustainment options.

What costs are included in a DoD life cycle cost estimate?

A DoD life cycle cost estimate includes research and development, procurement, operating and support, and disposal costs. O&S covers manpower, unit operations, maintenance, sustaining support, continuing system improvements and indirect support, as defined in the CAPE O&S Cost-Estimating Guide.

What share of life cycle cost is operating and support?

Operating and support costs historically account for about 70 percent of a weapon system's life cycle cost. That is why early decisions on reliability, maintenance concept and support structure have more effect on total cost than the purchase price.

How do you calculate life cycle cost?

Add every cost in the cost breakdown structure over the service life, discounting future costs to present value. LCC equals R&D plus procurement plus the present value of yearly O&S and disposal costs, minus any residual value.

Which guidance covers life cycle cost estimating?

The DoD Operating and Support Cost-Estimating Guide and the GAO Cost Estimating and Assessment Guide are the main references for defense programs. OMB Circular A-94 sets federal discount rates, NIST Handbook 135 covers federal energy projects, and IEC 60300-3-3 is the international standard.