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Measuring Overall Craft Effectiveness (OCE) - page 5 / 13





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The Maintenance Excellence Institute

How OCE Impacts Your Bottom Line: Part II – Page 5

Valuable Craft Time Can Be Regained: Tremendous opportunities are available for the 20 person craft work force with wrench time currently in the 30% to 40% range. Just a 10% to 20% improvement up to 50% wrench time can be from 4,000 to 8,000 hours of added wrench time. This gain represents a 25% to 67% increase in overall craft labor capacity. There are a number of best practices to help you regain valuable craft resources. The maintenance best practice for planning and scheduling requires a dedicated planner(s). An effective maintenance planner can support and plan for 20 to 30 crafts positions.

Use your CMMS/EAM as a mission-essential information technology tool that supports planning and scheduling, better MRO materials management and effective preventive maintenance, three best practices for improving craft wrench time. Bottom line results that give us 5 to 13 more equivalent craft positions and up to $500,000 in gained value of more wrench time with existing staff, can be dramatic proof that internal maintenance operations can be profit centered.


Craft Performance (CP): The second key element affecting Overall Craft Effectiveness is craft performance. This element relates to how efficient we are in actually doing hands-on craft work when compared to an established planned time or performance standard. Craft performance (CP) is expressed as the ratio of:

CP% =

Total Planned Time (Hours) Total Actual Craft Hours Required


Craft performance is directly related to the level of individual craft skills and overall trades experience as well as the personal motivation and effort of each craftsperson or crew. Effective craft skills training and technical development contribute to a high level of craft performance.

Craft Performance Calculation: The planned time for a minor overhaul or PM procedure is 10 hours based on a standard procedure with parts list, special tools, permits required, etc.

If the job is completed in 12 hours, then Craft Performance =

10 12

x 100 = 83%

If the job is completed in 9 hours, then Craft Performance =

10 9

x 100 = 111%

An effective planning and scheduling function requires that reasonable estimates and planning times be established for as much maintenance work as possible. Since maintenance work is not highly repetitive, the task of developing planning times is more difficult. However there are a number of methods for establishing planning times for maintenance work including:

  • Reasonable estimates: A knowledgeable person either a supervisor or planner uses their experience to provide their best estimate of the time required. This approach does not scope out the job in much detail to determine method or special equipment needed.

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