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A part or item which is manufactured primarily or the commercial rather
than the military market.
An assembly or combination of parts and assemblies mounted together.
Normally capable of independent operation in a variety of situations.
The supplier of an end item and associated support items to the customer
under the terms of a specific contract.
The impact of a particular item on mission success.
As used in this reference guide, either a customer or civilian procuring
agency for whom a product is designed and/or manufactured.
Data Item Description:
Identification of the contractor's approach to how the Logistics Support
Analysis will be conducted to meet program requirements as part of the product
The highest level of maintenance. Supports lower categories of maintenance
by providing technical assistance and any maintenance that is beyond the
responsibility of the lower levels. Depot maintenance activities may include
major overhaul or a complete rebuild, including manufacture of parts, testing,
and reclamation, as required.
Qualitative, quantitative, physical, and functional value characteristics
that are inputs to the design process, for use in design tradeoffs, risk
analysis, and development of a system that is responsive to system
Draft Technical Publication:
Publications which are used for engineering tests, service tests, and
initial production tests, usually of prototype models or equipment. The draft
technical publication is also used for review and coordination by the
A final combination of parts or assemblies or materials which is ready for
its intended use; (e.g. ship, tank, aircraft, receiver, or support
The permanent or semipermanent real property assets required to support the
product, including conducting studies to define types of facilities or
facility improvements, locations, space needs, environmental requirements, and
equipment. One of the principal elements of logistics.
Failure Modes, Effects and Criticality Analysis:
An analysis to identify potential design weaknesses through systematic,
documented consideration of the following: all likely ways in which a
component or product can fail, causes for each model, and the effects of each
failure (which may be different for each operational phase).
The total number of failures within an item population divided by the total
number of life units (time units, rounds, cycles) used by that population
during a measurement interval, under stated conditions.
Full Scale Development:
The design phase in which the product and all necessary support items are
designed, fabricated, and tested, including both contractor and customer test
A review of technical manuals in the process of preparation, primarily to
provide guidance to the preparing activity.
Integrated Logistics Support Program:
A composite of the elements necessary to ensure the effective and
economical support of a product at all levels of maintenance for its
programmed life cycle. As used herein, the term encompasses the consideration
of these elements during the product design process, the procedures for
analyzing and documenting these considerations, and the process of planning to
acquire these elements on a timely basis.
Maintenance performed at a special repair location at a site removed from
the operational location of the product. Some minor repair and/or rebuilding
could be done at this level of maintenance.
A non-specific term used to denote any product, including a system,
materials, parts, subassemblies, sets, accessories, etc.
The art and science of management, engineering, and technical activities
concerned with requirements, design, and resource supply and maintenance to
support objectives, plans, and operations.
Logistics Support Analysis Process:
A planned series of activities to examine all elements of proposed product
support to prevent duplication of logistics efforts and to ensure commonality
and integration of logistics support development. This process is intended to
influence design so both the product and its support can be provided at an
Logistic Support Analysis Record:
The written documentation of the logistic support analysis, recorded in
deliverable form, that is the basic source of data related to the maintenance
and logistic support for a specific item or product.
The measure of the ability of an item to be retained in or restored to a
specified condition, using prescribed procedures and resources, at each level
of maintenance and repair.
The basic levels of maintenance into which all maintenance activity is
divided. The scope of maintenance performed within each level must be
consistent with the personnel, equipment, technical data, and facilities
A description identifying the broad approach to be used to sustain a
product in the user's environment. Usually includes guidelines on projected
maintenance tasks, levels, and locations; fault isolation and testing
approach; and compatibility with existing support.
Operational Availability (Ao):
The probability that a product will operate satisfactorily when used under
stated conditions. Ao is expressed by the following formula:
Ao = (MTBM + ST)(MTBM + MDT + ST)
- MTBM is mean time between maintenance. MTBM considers both corrective and
- ST is stand-by or idle time
- MDT is mean maintenance downtime or average time a unit is not functional
due to corrective and preventive maintenance and administrative and logistics
A description specifying the standards for product deployment,
organization, basing, and support from which detailed resource requirements
and implementing programs can be derived.
This is the lowest level of maintenance. It is performed at the operational
site of the product. Often this level of maintenance is comprised of simple
replacement of failed components.
One or more pieces joined together which are not normally subject to
disassembly without destruction or impairment of the part's usage.
The supply of individuals, identified by specialty or classification,
skill, skill level, and rate or rank, required to satisfy the manpower demand
associated with a product. This supply includes both those individuals who
support the product directly and those individuals who support the product
indirectly by performing those functions necessary to produce and maintain the
personnel required to support the product directly.
As used herein, refers to the end item for which the customer, either
civilian or military, is paying.
The management process used to determine and acquire the range and quantity
of support items needed to operate and maintain an end item.
Provisioning Performance Schedule:
A checklist of events, including schedules in the provisioning process,
that is used to monitor provisioning events.
Provisioning Requirements Statement:
The contractual document used by the Government to notify the contractor of
specific provisioning requirements.
Provisioning Technical Documentation:
A term used for the various types of provisioning lists, LSA summary
reports, punch cards or data tapes which identify the items to be
The probability of satisfactory product performance for a given period of
time under specific operating conditions.
Support items that are coded as repairable. Spares differ from repair parts
which are coded as not repairable or consumable.
Statement of Work:
A detailed definition of the performance requirements of a particular
Two or more parts which form a portion of an assembly or component,
replaceable as a whole but having a part or parts which are individually
Supplementary Provisioning Technical Documentation:
Technical data used to describe parts and equipment. Supplementary
technical documentation consists of data such as specifications, standards,
photographs, sketches, descriptions, assembly and general arrangement
drawings, schematic drawings, and wiring and cable diagrams needed to indicate
physical characteristics, location, and function.
The degree to which the product can be supported, both in terms of the
inherent characteristics of prime equipment design and the effectiveness of
the overall support capability.