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(by Choong Ewe Lee)


For the last 25 years, we have witnessed the shift of focus of maintenance in Quality Management System, from the beginning of Preventive Maintenance in 1990’s (ISO 9001:1994), to Predictive Maintenance after 2000 (ISO/TS 1694:2002), and currently focus on Productive Maintenance (IATF 16949:2016).

What are the difference of the above three maintenance systems ?
We have always shared with our clients that, the three(3) maintenance systems may have different focus in term of its objectives, and they are complimentary to each other. For preventive maintenance, we shall maintain as per its preventive maintenance schedule, and it is to prevent the machine from sudden breakdown.

Although we conduct preventive maintenance, but we still have sudden breakdown from time to time, and cause the machine breakdown for long hours or weeks, because we just wait for one or two spare parts from machinery supplier. Therefore, we start to think of how to quickly up a machine once it has brokendown. So, the best way is, to predict when the critical machine is going to change spare parts, or brokendown. This make us focus on predictive maintenance for the last decade.


Now, the IATF 16949:2016 would like us to shift our focus to Productive Maintenance System by not only reducing sudden breakdown, and its down time, but also to ensure that, we can maintain the machine with the objective in mind to make the machine more productive by achieving the required cycle/run time or required volume as per promised to customers.

So, any extra to do with this new requirements?


With this new requirements, we have suggested our clients to continue the practices of current preventive and predictive maintenance. Besides, they shall identify the key process equipment necessary (especially at bottle neck area) that will affect the manufacturing/assembly process from producing the volume required by customers, and also track the maintenance objectives, such as OEE (Overall Equipment Effectiveness), MTBF (Mean Time Between Failure), and MTTR (Mean Time To Repair). The maintenance team shall also have the periodical overhaul to ensure the productivity of the machinery/key process equipment.

Next Issue:
The Temporary Change of Process Control

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