The prime objective is to maximise the uptime of machines and other equipment. Maintenance techniques have evolved over the years and have been adapted to various situations. Some programs are customised to maximise uptime. Others are designed to minimise the cost of spares while others are optimised to minimise human interference. The term maintenance is taken as the combination of technical, administrative and managerial actions that are taken throughout the lifecycle of equipment and machines. Broadly maintenance can be classified into two categories which are corrective maintenance and preventive maintenance.
Corrective Maintenance When a machine or equipment breaks down and maintenance is then carried out, it is known as corrective maintenance. Generally corrective maintenance has been the most extensive maintenance technique that has been applied throughout the years. Previously corrective maintenance was the preferred technique. . It was largely held that maintenance should be carried out when the parts of a machine or equipment complete their effective lifetime. This belief emerged as a solution to optimise the life of parts. The replacement of parts before need arose was not a highly preferred technique. However, as industrial enterprises expanded and competition arose, the need for maximising uptime increased. This was only possible if parts were replaced before break down as the failure of one part would endanger the other workings parts. The development of HSE (health, safety and environment) requirements meant that machine and equipment failure was not tolerable anymore. In case that machine and equipment failed, there were significant chances for the discharge of lethal products such as ammonia, cyclo hexane, lead based compounds etc. (Lockheed Martin, 2011) Eventually, maintenance enterprises moved over to the practice of replacing defective parts before failure. These methods are better known as preventive maintenance. Preventive Maintenance The contention behind preventive maintenance is to avoid failure in the first place. This is necessitated by objectives that define the maximisation of production times and the minimisation of safety incidents. Most equipment and machines are installed in such a complicated manner that monitoring all equipment and machinery at all times in not practicable. Therefore, certain intervals for machinery and equipment monitoring must be defined. These techniques tend to be designed in different ways that maximise different offerings from maintenance. While preventive maintenance strategies offer benefit in the longer run but migration to preventive maintenance systems is often troublesome in the shorter run. Often the problem lies with maintenance costs and human factors. Moreover, preventive maintenance demands that machines and equipment be opened up even if troublesome symptoms are not present. This often reduces the effective lifetimes of machines as certain parts need to be replaced with every maintenance operation. Preventive maintenance strategies display certain disadvantages if implemented purely. These disadvantages can be covered up by
This text analyses the move towards CBM (condition based monitoring) as well as its major methods, advantages, disadvantages and implementation in the practical arena. Maintenance refers to various techniques that are utilised to ensure that equipment and machinery is available for work…
‘Reliability’ in this sense is the chance of failure of PV system or its parts over time which includes numerous materials, components and subcomponents. It is in this context that each of these parts and components are subjected to frequent failures of instruments which can result in ineffective PV module reliability (Muneer, “Large-Scale Solar PV Investment Planning Studies”).
Contents Abstract 2 Contents 2 Maintenance Methods 3 Corrective Maintenance 3 Preventive Maintenance 4 RCM Based Methods 4 Introduction to CBM 5 Methods Utilised in CBM 6 Advantages of CBM 7 Disadvantages of CBM 8 Implementing CBM 9 Rotating Mechanical System 9 Pumps and Compressors 9 Rolling Element Bearings 10 Pipelines and Static Equipment 11 Induction Motors and Gearboxes 11 Heat Exchangers 12 Conclusion 12 Bibliography 14 Maintenance Methods Maintenance refers to various techniques that are utilised to ensure that equipment and machinery is available for work.
The hospital has many specialties but is nationally ranked in cancer, cardiology & heart surgery, diabetes & endocrinology, ear nose & throat, geriatrics, nephrology, orthopedics, pulmonology, urology, neurology & neurosurgery.
The paper operates mainly based on research questions which can be stated as follows: Technical log: required information, purpose, who can certify? How is data recorded, kept where? Maintenance schedule: who creates it? who approves it? types of maintenance check, flight hours and cycles, work pack, job cards maintenance records?
This paper contains a summary of an implementation of an EBP guideline for breast cancer patient care and the subsequent evaluation of the effect of its implementation. Various barriers to the complete adaptation of EBP are also examined and some solutions were presented. EBP application towards renal failure was also explored.
Studies have shown that nearly 10.1% of the overall operation of a company is related to the maintenance task. This clearly reflects the commitment of aviation companies in maintaining safety. However, the recent global credit crunch has resulted in failing demands and low profit margins.
ing its implications on care for respiratory patient and the impact it would have on my future practice together with critiquing the study in general.
This research study appreciates VAP as a major burden in healthcare due to the associated mortality, cost of healthcare, period
(Wong et al., 2009, p. 2). ESRD and ESRF iare diagnoses that are made when an individual loses 85% to 90% of kidney function, which means that the kidneys cannot remove toxins and waste from the blood, so 60% of patients with