Defect monitoring moves to a new level -

Defect monitoring moves to a new level

LONDON — A SMART Group/DTI PPM Project aimed at improving the way companies compare their manufacturing yields with other similar businesses is to be taken to a new level. The information did not exist or was not easily available to small and medium volume companies until the launch of the project which eased the sharing of process yield data for company comparison.

The most commonly used method of illustrating yield is Part Per Million (PPM) Defective. This provides a measure of the defect level against a process stage or a specific product compared against a known number of opportunities for defects to occur. There are IPC and IEC documents and procedures which do exist to monitor a process which will support the PPM evaluation.

LEADOUT is one of the largest European projects on lead-free technology for SME’s, supported by the 6th Framework Programme of the European Commission and will take the PPM project to a European level with the collection of PPM Defect data for existing tin/lead and lead-free assemblies. The data collection will be based on the existing methods of collection to make sure the results can be easily compared across the industry.

A special training workshop held with members of the LEADOUT consortium and was run by Bob Willis, leader of the original PPM project, to make sure that data collected over the coming months was coordinated in a way that will again benefit the industry across all European states.

The aim of this workshop was to show how to implement a defect monitoring project in the industrial assembly line and the yield data to be collected. The PPM methodology will be transferred to the LEADOUT assembler partners that will take part in the benchmarking process.

Attending the training event were Margarida Pinto (ISQ, Portugal), Cristina Jimenez (INASMET, Spain), Bob Willis (SMART Group, UK) ,Damien Kirkpatrick (TWI), Jose Luis Barreda (INASMET), Simon Mason (TWI), Laszlo Tersztyanszky (BUTE, Hungary), and Balazs Illes (BUTE, Hungary).

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