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Installation commission and maintenance part 2

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Topic 

- Maintenance concept
- Types of maintenance
- Predictive maintenance
- Condition based maintenance
- Maintenance management
- It's objective
- Benefits of maintenance management

Maintenance concept


The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, governmental, and residential installations.
Often maintenance functions are referred to as Maintenance, repair and overhaul (MRO) and MRO is also used for Maintenance, repair and operations. Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions:

Any activity—such as tests, measurements, replacements, adjustments, and repairs—intended to retain or restore a functional unit in or to a specified state in which the unit can perform its required functions.
All action taken to retain material in a serviceable condition or to restore it to serviceability. It includes inspections, testing, servicing, classification as to serviceability, repair, rebuilding, and reclamation.

The marine and air transportation, offshore structures, industrial plant and facility management industries depend on maintenance, repair and overhaul (MRO) including scheduled or preventive paint maintenance programmes to maintain and restore coatings applied to steel in environments subject to attack from erosion, corrosion and environmental pollution.

The basic types of maintenance falling under MRO include:

Preventive maintenance, also known as PM

Corrective maintenance where equipment is repaired or replaced after wear, malfunction or break down.
Predictive maintenance, which uses sensor data to monitor a system, then continuously evaluates it against historical trends to predict failure before it occurs.

Reinforcement
Architectural conservation employs MRO to preserve, rehabilitate, restore, or reconstruct historical structures with stone, brick, glass, metal, and wood which match the original constituent materials where possible, or with suitable polymer technologies when not.

Main objective of PM are:


Enhance capital equipment productive life.
Reduce critical equipment breakdown.

Predictive maintenance techniques are designed to help determine the condition of in-service equipment in order to estimate when maintenance should be performed. This approach promises cost savings over routine or time-based preventive maintenance, because tasks are performed only when warranted. Thus, it is regarded as condition-based maintenance carried out as suggested by estimations of the degradation state of an item.

Predictive replacement is the replacement of an item that is still functioning properly.Usually it's a tax-benefit based[citation needed] replacement policy whereby expensive equipment or batches of individually inexpensive supply items are removed and donated on a predicted/fixed shelf life schedule. These items are given to tax-exempt institutions.

Condition-based maintenance

Condition-based maintenance (CBM), shortly described, is maintenance when need arises. Albeit chronologically much older, It is considered one section or practice inside the broader and newer predictive maintenance field, where new AI technologies and connectivity abilities are put to action and where the acronym CBM is more often used to describe 'condition Based Monitoring' rather than the maintenance itself. CBM maintenance is performed after one or more indicators show that equipment is going to fail or that equipment performance is deteriorating.

Advantages and disadvantages
CBM has some advantages over planned maintenance:

Improved system reliability.
Decreased maintenance costs.
Decreased number of maintenance operations causes a reduction of human error influences.
Its disadvantages are:

High installation costs, for minor equipment items often more than the value of the equipment
Unpredictable maintenance periods cause costs to be divided unequally
Increased number of parts (the CBM installation itself) that need maintenance and checking.

Scheduled maintenance is any repair and upkeep work performed within a set timeframe. It details when given maintenance tasks are performed and by whom. Scheduled maintenance may occur at repeating intervals or in response to a work request.

What is maintenance management?

Maintenance management involves keeping track of assets and parts. The purpose is to ensure that production proceeds efficiently and the minimum amount of resources are wasted. This is generally accomplished by a tailored combination of software, practices, and personnel that focus on achieving these goals.

Objectives of maintenance management

Almost any business process has objectives and maintenance management is no different. The five main objectives are:

Budgeting.
Scheduling work.
Regulation compliance.
Optimizing work.
Improving safety.

Benefits of maintenance management

Before we get into the specifics of what the benefits of maintenance management are, it’s worth pointing out that many of these are positive results to the general objectives of maintenance management. That’s not a coincidence; when the objectives are reached, these benefits flow over the entire company in question.

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