Many plants use Overall Equipment Effectiveness (OEE) as a plant level metric but my understanding is that OEE was developed as a machine level metric.

Am I misunderstanding OEE?

Terry O

First of all OEE is used primarily for constrained equipments or bottleneck equipments. During our TPM days we measure OEE on our Managers Model Machine (Pilot Machine), these are on the Rank A or Worst Machine Category.

For plants measuring OEE on a wide scale basis or which means all machines in the plant, again this is used to determine which process is the bottleneck, softwares are being used for this occasions as it is very tedious to perform this calculation manually.

OEE is quite easy to use for equipments that do not change product or those equipments in manufacturing that process the same product but for those equipment's that are not dedicated which means that more than one product is being process on a given period, the uph of both products should be included in the calculation.

Again, I would like to summarize :
1st - OEE is used for pilot machines modelling
in their TPM journey which are the bottle
neck machines.

2nd - Some plants compute overall plant
effectiveness or OEE for all machines
to determine which station, or process
is the bottleneck. Softwares are used
to ease up with the calculation

3rd - UPH (units per hour the machine process)
must be taken into consideration if the
equipment is being converted from one
product to another.

I have a complete line up of training materials i've developed through the years in my TPM days which includes the following :

1) Understanding Total Productive Maintenance -
JIPM Approach

2) Planned Maintenance 4 Phases TO Zero
Unplanned Breakdown

3) Understanding TPM's- Autonomous Maintenance
Steps 1 to 3 of Jishu Hozen (Part 1)

4) Understanding Relationship Between Equipment
Losses and Overall Equipment Effectiveness

My Warm Regards,


Rolly Angeles
Teacher

Terry, you already post this at the other place and I would like to comment on the article you just bought in Don't be Misled by O.E.E.
Measure of Equipment Effectiveness Often Misused

http://maintenanceforums.com/eve/forums/a/tpc/f/409103451/m/9851008532

There are quite bit of information on the report that are misleading and I would like to have a friendly comment so as to about confusion.

Let me explain in a laymans position, a basketball team may have around 8 players or more but the game will always be played by 5 men. When a game is completed say Chicago Bulls vs Lakers with a score of 100 - 95, which was won by Chicago Bulls (lets say Jordan is still around), 40 points was scored by Jordan, Pipen with 20 points, and the rest totalling 40 points to make up the 100 points score, Jordan made the highest contribution.

TPM is made of 8 pillars namely as follows :
1) Autonomous Maintenance
2) Planned Maintenance (This is the Maintennce function)
3) Focused Improvement (This is Michael Jordan)
4) Quality Maintenance
5) Office TPM
6) Environment Health and Safety
7) Training and Education
8) Initial Flow Control Activities

It is not the Planned Maintenance that will impact greatly on OEE but it is more of the Focused Improvement Pillar,

Let us say that numbers 1 to 4 are the key players and 5 to 8 are the support players that in a way contribute to the game of OEE. With Planned Maintenance and Focused Improvement acting as Micheal Jordan and Scottie Pipen, which means they have contributed a lot, but each pillar will in its way contribute to the OEE itself.

quote:

O.E.E. is a process for characterizing and communicating the major equipment-related losses. If it is only used as a "calculated rating," it cannot be used by reliability professionals, operators or mechanics to quickly determine and eliminate the root causes of poor performance – as it should be used.

It can be used since there are levels in OEE
Level 1 : The OEE Score Itself
Level 2 : BY OEE Component
Availability / Efficiency / Quality
Level 3 : By knowing which compoment is weak then we can strenghten the pillars involved.

OEE Losses TPM Pillar Involve
Avail
- Breakdown - Planned Maintenance
- Set-up - Focused Improvment
- Cutting Blade - Planned Maintenance
- Start-Up Loss - Initial Flow Control & Planned Maintenance
- Shutdown Loss - Planned Maintenance

Efficiency -
- Minor Stoppage - Autonomous Maintenance
- Design Speed Loss- Focused Improvement

Quality Rate
- Defects/Rework - Focused Improvement and Quality Maintenance

quote:

O.E.E. is not a measure of "maintenance effectiveness." It is a measure of the factors that determine "equipment effectiveness." For example, of the 11 major losses listed above, "maintenance" is typically in direct control of only two: planned maintenance and breakdowns & failures. And quite often, these two major losses are also impacted by the operations roles. Maintenance alone cannot address all of the major losses captured for O.E.E. This is why O.E.E. is used in Total Productive Maintenance where the entire organization focuses on eliminating the major losses.

OEE is not designed as a primary measure for the maintenance function, but is a primary measure of TPM. And who will impact OEE ? From the pillars, mostly it would be the Focused Improvement, but each pillar will have their contribution to improving OEE. Again Focused improvement is a selection of cross functional people from the plant with involvement of Operations, Maintenance, engineers etc.

Again, having a high OEE will not only be the effort of the maintenance function but the effort from everyone from the organization, as in basketball, each player must always play as a team, like in TPM, these pillars are the team that will impact the Overall Equipment Effectiveness.

Regards,


Rolly Angeles
Teacher

This message has been edited. Last edited by: Rolly12,

I think OEE for Corporate Level only.