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| DRIVE | FALL 2014 |
| PROGRAM | MBADS (SEM 4/SEM 6) MBAFLEX/ MBA (SEM 4)PGDOMN (SEM 2) |
| SUBJECT CODE & NAME | OM0015-MAINTENANCE MANAGEMENT |
| BK ID | B1340 |
| CREDITS | 4 |
| MARKS | 60 |
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ASSINGMENT
Q1. What are the stages in the lifecycle management of any machinery?
Answer: 1. Development
The development stage can be a protracted stage and will involve activities such as design, planning, costing, test marketing, etc. The costs are high, with no earned revenue (and thus it does not register as a stage on the diagram at Figure A1-1). Promotion for awareness may commence in advance of introduction of the product to the marketplace.
2 Birth (or Introduction stage)
This is the stage where a product will be introduced after initial decisions like selection, technology selection, location and layout design of
Q2. Write short notes on:
- Fault tree analysis for improving maintenance effectiveness
Answer: For improving maintenance effectiveness one of the tools used is the fault tree analysis. In electrical and control systems, failures are linked to certain physical portions of the equipment. A fault tree is a network
- Routine maintenance
Answer: Simple, small-scale activities (usually requiring only minimal skills or training) associated with regular (daily, weekly, monthly, etc.) and general upkeep of a building, equipment, machine, plant, or system against normal wear and tear. Expenditures made for the regular upkeep of physical properties (i.e. Land
- Problems in maintenance scheduling
Answer: The problem of scheduling o-line preventive maintenance of power generating units is of substantial interest to the electric power industry. A typical power plant consists of one or two dozen power generating units which can be individually scheduled for preventive maintenance. Both
- Wrench Time
Answer: Wrench time is a measure of crafts personnel at work, using tools, in front of jobs. Wrench time does not include obtaining parts, tools or instructions, or the travel associated with those tasks. It does not include traveling to or from jobs. It does not include time spent obtaining work assignments. Obviously, it does not include break time. These non-wrench time tasks are often necessary to get work done, but are not “wrench time.” The craftsperson is in a
Q3. Why detail analysis and use of different methods are essential requirements for taking suitable decisions on the equipment replacements? Explain briefly these methodologies used.
Answer: Much research has been undertaken in equipment replacement optimization (ERO)including the Texas Department of Transportation’s (Tudor) ongoing equipment replacement optimization efforts. A detailed review of the state-of-the art and state of-the-practice literature of the ERO problem and commercial fleet management systems currently available worldwide can be seen and examined in a separate research paper (Fan et al. 2011). In summary, previous research efforts have been made to examine the ERO problem, which can be classified into and solved using
three categories from the solution approach perspectives:
1) Minimum Equivalent Annual Cost (EAC)
Q4. Explain briefly the ABC classification and reasons behind recommending ABC and VED classifications for managing inventory of spare parts for maintenance?
Answer: ABC classification is a ranking system for identifying and grouping items in terms of how useful they are for achieving business goals.
The system requires grouping things into three categories:
A – extremely important
Q5. Explain briefly the universal principles used for improving productivity of the maintenance management
Answer: Total Productive Maintenance (TPM) is a business process improvement method, developed from the perspective of maintenance management. TPM concentrates on productivity improvement, primarily by way of maximizing the availability of equipment.
To do that, small multidisciplinary teams improve step-by-step the Overall Equipment Effectiveness (OEE) of their machines or production lines.
Q6. What is meant by ‘Overall Equipment Effectiveness (OEE)’? What are its constituents and objectives served? List the OEE Losses?
Answer: Overall equipment effectiveness (OEE) is a hierarchy of metrics developed by Seiichi Nakajima in 1960’s to evaluate how effectively a manufacturing operation is utilized. It is based on the Harrington Emerson way of thinking regarding labour efficiency. The results are stated in a generic form which allows comparison between manufacturing units in differing industries. It is not however an absolute measure and is best used to identify scope for process performance improvement, and how to get the improvement. If for example the cycle time is reduced, the OEE can also reduce, even though more product is produced for less resource.
OEE measurement is also commonly
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