Reinventing The Wheel
EP Editorial Staff | December 2, 1997
A new look at the maintenance work management process
The goal of work management is lowest cost reliability, which has two parts: equipment reliability and human reliability. Equipment reliability is the final result–where the bottom line is improved by increased production output and lower operating and maintenance costs. Human reliability is the set of activities that leads to those results. Success is measured in terms of equipment reliability, but it is human reliability that is actually managed.
The wheel is the story of work management, not maintenance. Many departments work together to create reliability; the maintenance department is just one of them. Production, engineering, materials, and administration departments are all vital members of the work management team. The wheel needs to be reinvented to help the team understand its role in the process and the goal of the process as a whole.
The pain zone
Work management begins with work identification. Suddenly an alarm is raised! Production (or safety or the environment) is threatened and an emergency is declared. The pain zone hurts because it costs money. Production output is lost. Labor and materials that could have been used on other jobs are lost.
The ability to declare an emergency is a big hammer for the production department. The problem with having a big hammer is that everything starts to look like a nail. Emergencies are declared for pet equipment, for spare equipment, or just to make production feel safe. A big red nail on the wheel signifies the pain zone.
In terms of human reliability, the pain zone hurts for two reasons. First, the schedule is interrupted. Second, the production department makes this decision alone. When the production department is forced to decide by itself that work needs to be done, the advantage of joint prioritization is lost Decisions are not made in the best interest of the whole plant.
The large crescent on the right side of the wheel illustrates that teamwork must be an underlying theme of the way work is planned, scheduled, and accomplished. It also points out the difference between priorities and prioritization. Priority is an initial code for work urgency, while prioritization is the process of deciding the actual order in which work will be done.
In the work identification step, an initial priority identifies the urgency of the work. The value of the priority code is to separate emergencies from nonemergencies. Though a priority code can help organize work in the backlog, it does not determine the actual order in which nonemergency work will be performed.
Once work passes through the pain zone and into the backlog, the process of joint prioritization begins, and it does not end until the work is accomplished. Prioritization takes into account the impact the job has on output and the availability of labor, materials, and equipment to do the job.
Joint prioritization means that departments make decisions together. Production, maintenance, and engineering departments should meet weekly to decide the order in which jobs will be done. Decisions should be documented in published schedules. Then, schedules should be kept by tagging out equipment on time, completing a design for a scheduled job on time, or starting jobs on time and doing them well so they do not require rework. Joint prioritization goes all the way through the work accomplishment step because the real importance of a particular job is determined by when the job actually gets done.
Money is made in the productivity zone. Planning and scheduling are the primary sources of productivity in the work management process. They are tightly linked but entirely separate. Planning answers the “what” and “how” about a job; scheduling answers the “who” and “when.” Jointly answering these questions in advance provides a powerful machine for doing exactly the right work in exactly the right way at exactly the right time.
Productivity means that:
- Jobs are worked according to schedule
- Crafts and foremen do not have to chase parts or prints
- Production equipment is tagged out and cleaned for maintenance workers
- Multiple crafts on a single job are sequenced and coordinated
- Cranes, scaffolding, and transportation are ready when needed
- Job steps and permits are part of the work order package.
Productivity is the result of good planning and scheduling. The planning half of the productivity zone anticipates common obstacles to work accomplishment. Key activities include job scoping and assuring parts availability. The scheduling half of the productivity zone smoothly combines prioritized jobs and resources such as crafts, extra shifts, permits, and access to production equipment. Key activities include labor availability forecasting and long-range and daily scheduling.
The best way to define productivity is doing exactly the right work in exactly the right way at exactly the right time:
- Choosing jobs that have the biggest impact on reliability in the long run will lead to “exactly the right work” being accomplished.
- Working from a plan and allowing time to do quality work rather than slapping on Band-Aids is the way to do work “exactly the right way.”
- Matching labor and equipment availability, and scheduling the job just when the equipment condition or performance will be affected, will result in doing work at “exactly the right time.”
Productivity is often associated with the work accomplishment step, where the job is actually done. But the amount of productivity gained in that step is small compared to planning and scheduling. Some time is lost due to late starts, early quits, poor training, or incompetence. But most lost time is due to job obstacles such as missing parts or unavailable production equipment.
Daily schedule compliance Daily schedule compliance, the most important measure in work management, is the percent of actual labor hours devoted to scheduled work. Complying with the daily schedule is the payoff for being good at all the steps on the wheel. If the steps are done well, daily schedule compliance must improve. Plus, if daily schedule compliance improves, then exactly the right work is being done in exactly the right way at exactly the right time, and that generates productivity, reliability, and dollars for the bottom line.
Collect and use data
The black hole is where data goes to die. Craftsmen provide data that will make jobs easier to plan or execute, then never see it again. They write parts lists, readings, or equipment condition notes on the current work order, but do not see them print out on the next work order. Finally they give up and provide perfunctory data or no data at all.
Climbing out of the black hole requires using data to measure performance and analyze root cause, showing the results to crafts and foremen, or making sure relevant history prints out on the next work order. When data is visibly and productively used, crafts will provide it willingly.
Going out and finding work instead of waiting for it to find you is proactive. Any technique to identify work early is useful whether it is technical (for example, vibration analysis) or human (work history analysis). This connects the last step on the wheel with the first step and leads to continuous improvement.
Proactive programs such as preventive and predictive maintenance, condition-based maintenance, reliability-centered maintenance, and total productive maintenance help identify work early and perform work just in time. The results of being proactive are:
- Preventive maintenance frequencies make sense
- PMs are done on critical equipment, not all equipment
- Many predictive maintenance techniques are used–especially vibration, lube oil analysis, and thermography
- Predictive maintenance procedures successfully predict failures just prior to occurrence
- Critical systems are identified first and critical equipment follows from that
- Work is done according to actual equipment condition, not because of calendar or run time
- Operators routinely perform minor maintenance.
The proactivity zone is about avoidance rather than repair. In the proactivity zone, the cycle of emergencies is broken. In its place is a cycle of failure prevention. Proactive maintenance skips the pain zone, starts prioritizing jointly, and taps the power of the productivity zone.
The back half of the wheel is designed to solve problems. Information is discovered in the work accomplishment step, recorded in the documentation step, and used in the analysis and measurement step.
The second crescent is a reminder that the wheel needs the lubrication of problem solving to turn fast and smoothly. It also says that problem solving makes the wheel solid. If problems are not solved, the wheel disintegrates. Each step of the wheel is connected with the next. Each zone is dependent on all the others. The entire work management process must be strong at every step and in every zone to achieve lowest cost reliability.
The work management process is surrounded by an organization’s culture. Culture is pervasive and powerful; it influences every action and every decision. It exists whether management actively cultivates it or not.
Culture is people. It is the person making the decision and the people taken into consideration as the decision is made. People make decisions for technical reasons (the process) and for personal reasons (the culture).
Process and culture are equally strong. If they are not aligned, they pull people in different directions. People want to do the right thing, but are confronted with limitations. Do not force them to decide between process and culture–the company will always lose.
- When process and culture are not aligned, people are:
- Torn, and they compromise their decisions
- Impeded, and they have to take the long way around
- Blocked, and they stop and wait.
Each of these interferes with work management. The static and noise of culture starts to obscure the process picture. Eventually the interference becomes so strong that the process is barely visible. Technical reasons for decisions are lost and decisions are made for personal reasons. That is not good for work management, for management credibility, or for the business as a whole because this same culture affects all the processes in the business.
If the work management process is done well, lower cost reliability can be achieved, but only by aligning process and culture. MT
Michael Stephens is a principal with Reliability Management Group, a maintenance and management consulting firm, 151 W. Burnsville Pkwy., Suite 224, Minneapolis, MN 55337; (612) 882-8122.