Overall Equipment Effectiveness (OEE) is being used increasingly in industry because it takes the most common sources of manufacturing productivity losses to improve manufacturing and maintenance operations. OEE metric is always the first to be determined and after which is the need to develop a loss map for OEE main factors (uptime, speed and quality).
OEE is a hierarchy of metrics that can be used at the equipment, department, line and facility levels. Improving manufacturing and maintenance operations, OEE helps to uncover inefficiencies in production processes by showing how well a production line is functioning overall in terms of uptime, speed and quality. At this point, it is important to say that, technological inheritance model provides a single metric to integrate all the factors of OEE. Most companies have fairly good systems for capturing and tracking uptime and quality data, but determining design rate can be somewhat contentious. Even at best robust designs that meet desired requirements, still produce sub-optimal reliability results, hence the need to consider technological inheritance model. In order to develop a loss reliability map by taking the inverse of uptime, speed and quality percentage, reliability coefficient map can be developed real-time in terms uptime, speed and quality with technological inheritance coefficient ranging from "0 to 1", where 0 is the minimum reliability level and 1 is maximum reliability level. The next step will be to categorize the reliability growth and degradation distribution into distinct levels (minimum, medium and maximum). The reliability coefficient growth/degradation map is categorized into idle downtime, changeover downtime, early life, useful life and wear-out life.
Although, most companies do a fairly good job of capturing uptime and quality losses, but on the other hand, speed losses are seldom captured, which can vary often to produce major loss of productivity through gradual slow down whcih sometimes goes un notice. When a plant goes down, people notice it, but when it slows down, there isn,t that sense of urgency. However, the extent of lost production due to speed loss came as a surprise to management. More also reliability based on MTBF is not feasible for certain zero tolerance critical equipment, hence the need for automated control system that can capture/track speed, uptime and quality with a single metric during real-time operation in a systematic manner.
Technological Inheritance Model - based Software can now be used to capture and monitor reliability growth, degradation, OEE and other economic data, in order to uncover the hidden nuggets in repetitive small delays, production slow downs, component quality and other essential performance indexes. At the same time, it is used to build a better foundation for improving the business process of equipment maintenance, process control, data acquisition, monitoring, integration and selection of components.
Thank you for sharing the information.
ReplyDeleteOEE or say, overall equipment effectiveness is assisting almost in every aspect of the manufacturing industries by increasing and improving the productivity of the business.
Now a days, many companies are providing the service of OEE, for the better performance of the manufacturing industries. While probing on the internet, I came across an exquisite website, named as, rzsoftware.com, that is providing different services, that are assisting in the process of industrial production, in terms of uptime, speed and quality.