Value-Added Time (VAT)

Introduction: VAT

Value-Added Time (VAT) is a core Lean concept that measures the portion of total process time spent on activities that directly create value for the customer. By comparing VAT with Non-Value-Added Time (NVA), organisations can pinpoint inefficiencies and improve process performance.

Background

The idea of VAT stems from Lean’s focus on maximising customer value while minimising waste. Not all process steps contribute equally: some add direct value, while others create delays or costs. Understanding this distinction helps streamline operations and direct resources to where they have the greatest impact.

Key Elements/Features

• Definition: VAT includes only activities that change the form, fit, or function of a product or service in line with customer expectations.
• Importance: A higher proportion of VAT indicates greater efficiency and customer focus.
• Non-Value-Added Time (NVA): Includes waiting, unnecessary transport, excess motion, and defects that add no value.
• Waste Elimination: Lean tools like value stream mapping and continuous improvement are used to reduce NVA.

Applications/Examples

• Manufacturing: Machining a component is VAT; waiting for materials is NVA.
• Healthcare: Performing surgery is VAT; patient waiting time is NVA.
• Services: Resolving a customer query is VAT; duplicating paperwork is NVA.

Relevance/Impact

By increasing VAT and reducing NVA, organisations can shorten lead times, reduce costs, and deliver greater customer value. This focus reinforces a culture of continuous improvement and operational excellence, ensuring long-term efficiency gains.

See also

• Non Value Add
• Value added
• Waste Walk
• Kaizen