MS-57 Solved Assignment

Old Samples – Ignou MS-57 Solved Assignment

Q. What is reliability centred maintenance? What are the important steps involved in implementing it in any plant?

Answer. Reliability-centered maintenance (RCM) is a process to ensure that systems continue to do what their users require in their present operating context. It is generally used to achieve improvements in fields such as the establishment of safe minimum levels of maintenance……
Some important up-front activities include assembling an appropriate cross-functional team, making sure that all members of the analysis team understand and accept the ground rules and conditions of the analysis, gathering and reviewing relevant documentation, etc…….
Functional failures describe ways that the equipment may fail to perform its intended functions. This may include failure to perform a function, poor performance of a function, over-performance of a function, performing an unintended function, etc. As mentioned above, the performance limits that have been identified for the function may provide a guide to the functional failure description…….
When safety is not an issue, another is to compare normalized cost values for the available maintenance strategies and select the maintenance task that provides the desired level of availability for the minimum cost…..

Q. Define hazard rate the discuss the three periods or regions of the life cycle of a unit or device as illustrated by the ‘bath-tub’ curve.

Answer. The failure rate is defined for non repairable populations as the (instantaneous) rate of failure for the survivors to time t during the next instant of time. It is a rate per unit of time similar in meaning to reading a car speedometer at a particular instant and seeing……
For other distributions, such as a Weibull distribution or a log-normal distribution, the hazard function may not be constant with respect to time. For some such as the deterministic distribution it is monotonic increasing……
The failure rate is never zero at any point over the entire curve. Nevertheless, the three curves that form the overall failure rate curve can be depressed by some measures and inflated by others. Consider these three curves applied to a newly purchased laptop computer……

Q. What is the importance of maintenance budgeting? Give the advantage of Zero Based Budget.

Answer. The need for a maintenance budget arises from the overall budgeting need of corporate management and involves estimation of the cost of the resources (labour, spares etc.) that will be needed in the next financial year to meet the expected maintenance workload. It is explained via below figure.
Maintenance budgeting involves both the ongoing workload and also the major workload. It is important that the maintenance budget is set up to reflect the nature of the maintenance strategy and workload. There is a need for a longer term strategic maintenance budget that covers the …….
Against the regular methods of budgeting that involve just making some arbitrary changes to the previous year’s budget, zero-based budgeting makes every department relook each and every item of the cash flow and compute their operation costs…..

Q. How can be questionnaire for ‘Maintenance Audit’ prepared? What is the main difference of audition result areas compared to auditing management processes?

Answer. A maintenance audit permits you to review the effectiveness of your maintenance management system and processes at delivering the equipment reliability and plant availability you want….
Closed-ended questions have a specific range of options respondents can choose from. These questions may be yes-or-no questions, true-or-false questions, or questions that ask the respondent to agree or disagree with a statement. Closed-ended questions may look like open-ended questions, but will have only a few options respondents can use to answer…..
Though maintenance benchmarks or performance parameters give the audit team a comparable idea about the status, due to the requirement of standard definitions for these ratios, sometimes it becomes difficult to draw careful conclusions. Hence the auditing processes now a days are concentrating on the process parameters to make evaluations more meaningful……
There should be proper systems and procedures for inventory control, spares classification and codification, vendor management and spares preservation and reclamation……

Q. What are the characteristics of planned maintenance? Explain the working of a planned maintenance management system?

Answer. Planned maintenance is a proactive approach to maintenance in which maintenance work is scheduled to take place on a regular basis. The type of work to be done and the frequency varies based on the equipment being maintained, and the environment in which it is operating…..
You set up each of these inspections in the preventive maintenance plan for the conveyor belt. This not only applies to industrial equipment. You can also apply this to office equipment such as computers and copiers. For example, software updates, network tests and toner changes and plate inspections can be included on the preventive maintenance plan for office equipment….