Last edited 08 Jun 2020

Not right first time

Construction Quality Planning Guide, Draft for Consultation, Published by the Construction Innovation Hub in May 2020, suggests that Not Right First Time (NRFT) refers to: ‘The first measure under the QCD (Quality, Cost and Delivery) approach to improved production performance, it measures a product’s ability to match a specification. It is typically expressed in ‘number of defect parts per million’ with a defective unit defined as one that does not conform to specification and may be scrapped or reworked.’

QCD: measuring manufacturing performance, Published by the Department of Trade and Industry in 2004 suggested that Not Right First Time (NRFT) measures a product’s ability to match a specification and is expressed in number of defect parts per million.

Not right first time = 10^6 X (Quantity of defective units / Total quantity of units supplied)

NRFT can be measured internally and externally in the production cycle:

A defective unit is a unit that does not conform to specification and may be scrapped or reworked.

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