Definitions in maintenence

Common Definitions 

1. Autonomous maintenence

 A system which evaluate and up-grad itself is known as autonomous   maintenance.

 2.     Bill of Materials (BOM) :

 A bill of materials (sometimes bill of material or BOM) is a list of the raw materials, sub-assemblies, intermediate assemblies, sub-components, parts and the quantities of each needed to manufacture an end product.

For example:

Creating a Bill of Materials should include:

• BOM Level
• Part Number
• Part Name
• Phase
• Description
• Quantity
• Unit of Measure
• Procurement Type
• Reference Designators
• BOM Notes.      

3. Computerized Maintenance Management System (CMMS) :

 A system maintain and manage by computers it is known as computerized maintenance management system.

4. Corrective Maintenance :

 Corrective maintenance is a maintenance task performed to identify, isolate, and rectify a fault so that the failed equipment, machine, or system can be restored to an operational condition within the tolerances or limits established for in-service operations.

5.     Failure Mode and Effects Analysis (FMEA) :

 In system Analysis tool to Identify Failure modes, assign priorities to each failure mode based on cost and occurrences.

6.     Work Request: A request to do maintenance work in system.

7. Frequency of Inspection :

The time period between a repetitive inspection. The inspection frequency should be based on the failure developing period. Note: A rule of thumb is that the inspection frequency should be: Failure Developing Period/ two.

8.  Key performance Indicator (KPI) :

A performance indicator or key performance indicator (KPI) is a type of performance measurement. Some examples are.

• New customers’ acquisition.
• Demographic analysis of individuals (potential customers) applying to become customers, and the levels of approval, rejections, and pending numbers
• Status of existing customers
• Customer attrition
• Turnover (i.e., revenue) generated by segments of the customer population
• Outstanding balances held by segments of customers and terms of payment
• Collection of bad debts within customer relationships
• Profitability of customers by demographic segments and segmentation of customers by profitability

 9.  Life Cycle Cost (LCC) :

In system Total cost for acquiring, owning and disposing physical assets. Includes direct operational and maintenance costs and indirect costs for lost production when system fails is known as life cycle cost.

10. Maintenance Engineering :

Maintenance Engineers work on design specifications of minor modifications, preventive maintenance documentation, problem identification and elimination, maintenance training, and maintenance technical database.

11.  Maintenance Management :

 Maintenance management is the collective term for describing the management process of leadership and organization, planning and scheduling, preventive maintenance, condition monitoring, execution of maintenance repairs, recording, root cause failure analysis, spare parts management, and management of technical data supporting the processes above.

12.  Mean Down Time (MDT) :

 It means Average time of system (planning , Scheduled) is down for any reason.

13.  Mean Time Between Failures (MTBF) :

 Mean time between failures (MTBF) is the predicted elapsed time between inherent failures of a system during operation.

14.  Mean Time To Repair (MTTR) :

 Mean time to repair (MTTR) is a basic measure of the maintainability of repairable items. It represents the average time required to repair a failed component or device.

15.  Purchase Order :

 The document sent to a supplier to order parts, services, material, or machines.

 Or

 A purchase order (PO) is a commercial document and first official offer issued by a buyer to a seller, indicating types, quantities, and agreed prices for products or services the seller will provide to the buyer. Sending a purchase order to a supplier constitutes a legal offer to buy products or services. Acceptance of a purchase order by a seller usually forms a contract between the buyer and seller, so no contract exists until the purchase order is accepted. It is used to control the purchasing of products and services from external supplier.

16.  Root Cause Failure Analysis (RCFA) :

 In system a systematic way to collect select, analyze, and solve failures mode of operation.

17.  Scheduling :

 The process of determining what jobs gets worked on, when, and by whom based on the priority and resource/equipment availability. Note: that this process should take place before the job is executed. See definition for ”break-in job”. Scheduling short definition is when and who.

 18.  Up time :

 Opposite to Downtime. Time when a component, equipment or system is producing product. Note: The component, equipment or system may produce defect product or at a slower speed than usual.

 19.  Work Order :

 A work order or job order (sometimes job ticket or work ticket, as it often has some type of ticket attached) is an order received by an organization from a customer or client, or an order created internally within the organization. A work order may be for products or services.