Cost of Nonconformance
Cost of nonconformance is the money spent during and after the project because of failures, including internal failure costs (defects found by the project) and external failure costs (defects found by the customer).
Explanation
Cost of nonconformance represents the price paid for poor quality. It is divided into internal failure costs and external failure costs. Internal failures are defects found before the deliverable reaches the customer, such as rework, scrap, retesting, and downtime. External failures are defects found after delivery, such as warranty repairs, liability costs, complaint handling, and lost business.\n\nExternal failure costs are generally the most expensive and damaging category of quality costs. When a defect reaches the customer, the cost includes not only the direct repair but also damage to the organization's reputation, potential legal liability, and loss of future business. This is why catching defects early through prevention and inspection is so important.\n\nThe cost of nonconformance is often called the "cost of poor quality" or the "cost of doing it wrong." Projects with inadequate quality planning and management tend to have high nonconformance costs, which manifest as schedule delays, budget overruns, and unhappy stakeholders. The goal is to minimize nonconformance costs by investing appropriately in conformance activities.
Key Points
- •Includes internal failure costs and external failure costs
- •Internal failures: rework, scrap, retesting, downtime
- •External failures: warranty, liability, complaints, lost business
- •External failures are typically the most costly and damaging
Exam Tip
Rework is the most commonly tested example of internal failure cost. Warranty claims and liability are classic examples of external failure cost. Know these classifications.
Frequently Asked Questions
Related Topics
Cost of Quality (COQ)
Cost of Quality (COQ) is the total cost incurred over the life of a product by investing in preventing nonconformance, appraising deliverables for conformance, and dealing with failure when requirements are not met.
Cost of Conformance
Cost of conformance is the money spent during the project to avoid failures, including prevention costs (building a quality product) and appraisal costs (assessing the quality).
Prevention vs Inspection
Prevention keeps errors out of the process by designing quality into the work, while inspection keeps errors out of the hands of the customer by examining deliverables after they are produced.
Control Quality
Control Quality is the process of monitoring and recording the results of executing quality management activities to assess performance and ensure project outputs are complete, correct, and meet customer expectations.
Most-studied PMP concepts
High-yield topics our learners drill most before exam day.
Burndown Chart
A Burndown Chart is a graphical representation of work remaining versus time in a Sprint or release, showing whether the team is on track to complete the planned work.
Resource Leveling
Resource leveling is a resource optimization technique in which adjustments are made to the project schedule to keep resource usage at or below a defined limit, often resulting in a longer project duration.
Risk Register
The risk register is a project document that records the details of individual project risks, including their identification, analysis results, response plans, and current status.
Stakeholder Mapping
Stakeholder mapping is the visual representation of stakeholder relationships, influence, interest, or other attributes using grids, matrices, or diagrams to support analysis and engagement planning.
Relative Estimation
Relative Estimation is an agile technique where work items are sized in comparison to each other rather than in absolute units like hours or days, providing faster and more accurate estimates.
Cost Performance Index (CPI)
Cost Performance Index (CPI) is an EVM efficiency metric that measures cost performance as the ratio of earned value to actual cost: CPI = EV / AC.
Schedule Performance Index (SPI)
Schedule Performance Index (SPI) is an EVM efficiency metric that measures schedule performance as the ratio of earned value to planned value: SPI = EV / PV.
Earned Value Management (EVM)
Earned Value Management (EVM) is a methodology that integrates scope, schedule, and cost data to assess project performance and progress objectively.
Power/Influence Grid
The power/influence grid is a stakeholder classification model that groups stakeholders based on their level of authority (power) and their active involvement or ability to affect the project (influence).
Part of
Quality Management
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