Probability that an item will operate satisfactorily at a given point in time when used under stated conditions in an ideal support environment (ie, that personnel, tools, spares, etc, are instantaneously available), including active preventive and corrective maintenance downtime and excluding logistics time and waiting or administrative downtime.

Readiness

Time associated with processes or tasks not directly involved in repair activities, (i.e., processing requests, non-availability of tools, equipment, or facilities, and delays dues to establishment of higher priorities)

Logistics

A set of items at the same level of indenture having properties such that BIT can determine that at least one of the sets is faulty, but is unable to determine which particular one to be used as a metric, the maximum number of items within an Ambiguity Group or maximum number of Ambiguity Groups needs to be established.

Maintainability

An order for a good or service that cannot be filled at the current time due to a lack of available supply. The item could be not held in the company's available inventory but could still be in production, or the company could need to still manufacture more of the product.

Supply

A reported failure which cannot be replicated in the repair shop and is therefore unable to be restored to service.

Maintainability

Economic analysis that compares the relative costs and outcomes (effects) of different courses of action.

Affordability

Total elapsed time between the submission of a customer order and the receipt of that order.

Logistics

Total of all the different contributions that compromise operations

Readiness

Percentage of time that am order was filled with on-hand inventory.

Supply

Probability that an item will operate satisfactorily at a given point in time when used under stated conditions in an ideal support environment, including corrective maintenance downtime and excluding logistics time, waiting or administrative downtime, and preventive maintenance downtime.

Readiness

Probability that an item will operate satisfactorily at a given point in time when used under stated conditions in an ideal support environment, including corrective maintenance downtime and excluding logistics time, waiting or administrative downtime, and preventive maintenance downtime.

Readiness

Direct and indirect costs of a program over its entire life cycle including research and development costs, investment costs, operating and support costs, and disposal costs.

Affordability

All non-administrative maintenance delays involved in repair actions, including transportation, time to obtain spares, time to get trained personnel to repair, etc

Logistics

Amount of time that a system is not operational due to required maintenance work. The average down time for maintenance actions, including MTTR, LDT, and ADT

Maintainability

Probability that a facility be will ready and have the resources needed to perform required tasks. Influences the additional wait time for a maintenance action. Facilities have a maximum capacity.

Readiness

Total maintenance manpower burden required to maintain an item, including corrective and scheduled maintenance.

Maintainability

Percentage of the total inventory of a system operationally capable, based on materiel condition, of performing an assigned mission.

Readiness

The probability that the system will perform without failure over a specific interval.

Reliability

Ability of the supply chain to support weapon systems in undertaking and sustaining their assigned missions at planned peacetime and wartime utilization rates.

Logistics

Maximum time required to complete a specified percentage of all maintenance actions.

Maintainability

Average elapsed time needed to perform maintenance (preventive and corrective), excluding logistics and administrative delays. Time includes only actual repair time associated with a repair person performing maintenance steps (i.e., Localization, Isolation, Disassembly Interchange, Reassembly, Alignment and Checkout).

Maintainability

Average amount of time while the system is not 100% operational because of diagnostic testing that requires down time.

Maintainability

Time from when a repair starts until operations are restored, including repair time, testing period, and return to the normal operating condition (same as MTTR).

Maintainability

Average total downtime required to restore an asset to full operational capability, including actual repair time, fault detection, fault isolation, removal and replacement of failed components, verification, and all delay times.

Measures effectiveness of supply chain and support infrastructure (e.g., customer wait time, logistics response time, retrograde time).

Maintainability

Average downtime per maintenance action die to lack of training

Maintainability

Cumulative time required by all logistics processes to support the requisite repair, including Depot Repair Turn Around Time, Administrative Delay Time, Supply Response Time, and Customer Wait Time. Referred to as Support System Effectiveness Measure.

Logistics

Measure of maintainability taking into account maintenance policy. The sum of preventive and corrective maintenance times, divided by the sum of scheduled and unscheduled maintenance events, during a stated period of time.

Maintainability

Average of the maintenance cycle times for individual preventative maintenance actions of a system, including periodic inspection, calibration, scheduled replacement, etc.

Maintainability

Average time between events that result in the loss or degradation of an essential function(s) that renders the system unable to enter service or causes immediate removal from service, deadlines the platform, or makes it non-mission capable.

Readiness

Average time between system failures under specified conditions. This calculation assumes a normal failure distribution where in reality failure distributions tends to be Weibull or exponential. There are other more complex methods to calculate MTBF.

Reliability

Average time between maintenance activities under specified conditions, including preventative and corrective actions.

Maintainability

Mean of the distribution of the time intervals between actions or groups of actions required to restore an item to, or maintain it in, a specified condition, having both technical and operational characteristics.

Technical parameters reflect the technical reliability and Operational parameters reflect operational reliability and maintainability characteristics.

Maintainability

Average time (ie, operating hours, flight hours) between scheduled maintenance activities (ie: oil change, inspections, overhauls, etc).

Maintainability

Average time (ie, operating hours, flight hours) between unscheduled maintenance activities to restore a system to fully operational condition, including confirmation that no fault exists (a No Defect maintenance action).

Maintainability

Average time between failures that are determined to be critical by the customer.

Reliability

Mean of the distribution of intervals, measured in hours, rounds, etc, between preventive maintenance actions and one of the four categories of maintenance events contributing to the Mean Time Between Maintenance Actions (MTBMA).

Maintainability

Length of time that a non-repairable item is expected to operate until it fails.

Reliability

Time from when a repair starts until operations are restored, including repair time, testing period, and return to the normal operating condition.

Maintainability

Material condition of an aircraft indicating it can perform at least one and potentially all of its designated missions. Mission-capable is further defined as the sum of full mission-capable and partial mission-capable.

Readiness

Ability of an item to perform its required function for the duration of a specified mission profile, defined as the probability that the system will not fail to complete the mission, considering all possible redundant modes of operation.

Reliability

Material condition indicating that systems and equipment are not capable of performing any of their assigned missions because of maintenance work stoppage due to a supply shortage. Portrays how well the supply chain supports the materiel needs of weapon systems or groups of weapon systems.

Readiness

Material condition indicating that systems and equipment are not capable of performing any of their assigned missions because of maintenance requirement.

Readiness

Material condition indicating that systems and equipment are not capable of performing any of their assigned missions because of maintenance work stoppage due to a supply shortage. Portrays how well the supply chain supports the materiel needs of weapon systems or groups of weapon systems.

Readiness

Sustainment costs incurred from the initial system deployment through the end of system operations, including costs directly and indirectly attributable to the system such as Unit Operations, Maintenance, Manpower, Facilities, Sustaining Support, and Continuing System Improvement costs.

Affordability

(1) Percentage of time that a system or group of systems within a unit are operationally capable of performing an assigned mission.

(2) Probability that a system or component is performing its required function at a given point in time or over a stated period

of time.

Readiness

Average time required to fulfill an order demonstrating the speed at which demand can be satisfied.

Supply

Measure of the productivity of a piece of equipment which identifies how effective an organization’s maintenance processes are based on factors like equipment quality, performance, and availability. When OEE is 100%, the system is producing no

defects, as fast as possible, and with no stops.

Readiness

Total cost of acquiring and owning or converting an item of material, piece of equipment, or service and post-ownership cost, including the disposal of hazardous and other manufacturing waste.

Affordability

Material condition of a system indicating that it can perform at least one but not all of its missions.

Readiness

Material condition of an aircraft or training device indicating that it can perform at least one but not all of its missions because of maintenance requirements existing on the inoperable subsystem(s).

Readiness

Material condition of an aircraft or training device indicating it can perform at least one but not all of its missions because maintenance required to clear the discrepancy cannot continue due to a supply shortage.

Readiness

Probability that trained personnel are on-hand and ready to perform required tasks. Influences the additional wait time for a maintenance (preventive or corrective) action. Unavailability can be caused by the number of people required, the quality of the training received and the ability for repair.

Readiness

Amount of maintenance work planned to be done on a particular asset versus amount of time to repair it because it unexpectedly broke down.

Maintainability

Indicates the degree to which the scheduled maintenance tasks are at the correct frequency.

Maintainability

Percentage of the preventive work scheduled and completed in a set time.

Maintainability

Probability that the system will perform without failure over a specific interval, under specified conditions.

Reliability

Average time and percentage of time the weapon system materiel orders are filled within each echelon of the supply chain.

Supply

Preventive maintenance performed at prescribed points in the item's life.

Maintainability

Number of missions that a given unit can support in a given time.

Readiness

Probability that the number of on-hand spare units is not less than the number of failed units (ie, the probability of no stock-out). Influences the spares supply delay, which is the time required from the point of identifying the need for a part until that part is in the hands of the maintenance technicians. Unavailability can be caused by the lack of spares in stock.

Readiness

How well the demands of the various groups and organizations that are concerned with Supply activities, including customers, partners, suppliers and vendors, are being met.

Supply

How well the demands of the various groups and organizations that are concerned with Supply activities, including customers, partners, suppliers and vendors, are being met.

Logistics

Duration of time that a particular piece of equipment is able to perform its intended task. Synonymous with "Uptime". Influences the additional wait time for a maintenance (preventive or corrective) action. Unavailability can be caused by waiting for access to the item, insufficient quantities of support equipment,

calibration or failure of the support equipment.

Readiness

An evaluation of the quality of the training, the level to which training enhanced the employee's skill, knowledge, and behavior, and the time it took to train to the desired level of proficiency.

Training

Time either to transport a product for maintenance or to ship an item from a storage location.

Logistics

The length of time between arriving at a point and being ready to depart from that point, including loading, unloading, re-fueling, and re-arming, where appropriate, of vehicles, aircraft, and ships

Maintainability

Corrective maintenance required by item conditions.

Maintainability