Chapter 2 Terms Flashcards
(22 cards)
What is Maintainability
The probability that a failed item will be restored to its satisfactory operational state
What is Maintenance
All actions necessary for retaining an item or equipment in, or restoring it to, a specific condition
What is Reliability
The probability that an item will perform its assigned mission satisfactorily for the stated time period when used according to the specified conditions
What is Availability
The probability that an item is available for use when required
What is Mission time
The time during which the item is carrying out its assigned mission
What is Downtime
The total time during which the item is not in satisfactory operating state
What is Logistic time
The portion of downtime occupied by the wait for a required part or tool
What is Failure
The inability of an item to operate within the defined guidelines
What is Serviceability
The degree of ease or difficulty with which an item can be restored to its working condition
What is Redundancy
The existence of more than one means for accomplishing a stated function
What is Failure mode
The abnormality of an item’s performance that causes the item to be considered to have failed
What is Human reliability
The probability of accomplishing a task successfully by humans at any required stage in the system operation with a given minimum time limit (if the time requirement is stated)
What is Useful life
The length of time a product operates within a tolerable level of failure rate
What is Maintenance concept
A statement of the overall concept of the product specification or policy that controls the type of maintenance action to be taken for the product under consideration
What is Corrective maintenance
The repair or unscheduled maintenance to return items or equipment to a specified state
What is Continuous task
A task that involves some kind of tracking activity (e.g. monitoring a changing situation)
What is Human performance
A measure of human functions and actions under some specified conditions
What is Active redundancy
A type of redundancy in which all redundant units are functioning simultaneously
What is Human error
The failure to carry out a specified task (or the performance of a forbidden action) that could result in disruption of scheduled operations or damage to property or equipment
What is Active repair time
The period of downtime when repair personnel are active to effect a repair
What is Inspection
The qualitative observation of an item’s condition or performance
What is Overhaul
A comprehensive inspection and restoration of a piece of equipment or an item to an acceptable level at a durability time or usage limit
