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MAINTENANCE MANAGEMENTSubmitted to:- Submitted by:- Dr. Mini Swapnil chatterjee Sekharan 3rd sem, SIF, CUSAT
INTRODUCTION The design life of each equipments requires periodic maintenance. The objectives of maintenance management are --- To maintain the equipments in its best operating condition with economical cost. Extending the life of the equipment to its design. Types of Maintenance Management are --- Breakdown or Reactive Maintenance, Preventive Maintenance and Predictive Maintenance.
Reactive Maintenance Run it till it breaks Maintenance Mode.Advantages:--- Low investment cost for Maintenance. Less staff is required. Dis--advantages:--- In-efficient use of staff. Waiting for the equipment to break is responsible for shortening of the life of the equipment causes more frequent replacement with high replacement cost. To repair the critical piece of equipment and to bring it in action very quickly, the maintenance overtime cost occurs. Primary equipment damage due to absence of Preventive Maintenance causes also Secondary equipment or Process damage ensuring more additional costs.
Preventive Maintenance Actions performed on a time or machine run based schedule that detect, preclude or mitigate degradation of a component or system with the aim of sustaining or extending its useful life through controlling degradation to an acceptable level.Advantages:- Dis-advantages:- Equipment life is extended Catastrophic failures still and its reliability increased. Energy savings. likely to occur. 12%-18% cost savings over Performance of unneeded Reactive Maintenance Maintenance. program. Potential for incidental damage to components in conducting unneeded Maintenance.
Predictive Maintenance Measurements that detects the onset of a degradation mechanism, thereby allowing casual stressors to be eliminated or controlled prior to any significant deterioration in the component physical state. Predictive Maintenance differs from the Preventive Maintenance based on the Maintenance need on the actual condition of machine rather than on some pre-set schedule.Advantages:- Dis-advantages:- Increased component life. Decrease in costs for parts Increased and labour. investment in staff Better product quality. training. Energy savings. Improved worker and Savings potential not environmental safety. readily seen by Estimated 8%-12% cost management. savings over Preventive Maintenance program.
Maintenance Planning Maintenance Planning is done to find the answer of What & how is the job and where the job is to be done. It is depended on the Efficiency and Cost of action. Persons involved in Maintenance Planning should have the Knowledge about jobs,
Steps of Maintenance Planning The main steps to be followed for proper Maintenance Planning are -------- Knowledge Base:- It includes knowledge about equipment, job, available techniques, materials and facilities. Job Investigation at the site:- It gives the clear perception of the total jobs. Identify and Document the work:- Knowing the earlier two steps and knowing the needs of Preventive , Predictive and other Maintenance jobs. Development of repair plan:- Preparation of step by step procedures which would accomplish the work with the most economical use of time, manpower and material. Preparation tools and facilities list indicating the needs of special tools, tackles and facilities needed. Estimation of time required to do the job with work measurement technique and critical path analysis.
Maintenance SchedulingScheduling is the function of coordinating all of the logistical issue around the issues regarding the execution phase of work.