Encl. (1) to COMDTINST 4100.7
Engineering Logistics
CONOP
VI. Appendix II - Glossary of Terms
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Centralized. Indicates that responsibility and authority for logistics requirements are vested in a
single individual or office.
Integrated Logistics Support (ILS). A composite of all the support considerations necessary to
assure the effective and economical support of a system for its life cycle. It is an integral part of
all other aspects of system acquisition and operation. ILS is characterized by harmony and
coherence among all the logistics elements. The principal elements of ILS include: maintenance
planning; supply support; technical data; facilities; manpower and personnel; training and training
support; support equipment; computer resources support; packaging, handling, storage and
transportation; design interface. - Source COMDTINST 4105.2
Integrated Logistics Support Plan. The formal
planning document for logistics support. It is kept current throughout the life cycle of the
program, and sets forth the plan for operational support. Provides a detailed ILS program to fit
with the overall program, provides decision-making bodies with necessary ILS information to
make sound decisions in system development and production.
Logistics. The movement and maintenance of forces. Those aspects of military operation which
deal with design and development, acquisition, storage, movement, distribution, maintenance,
evacuation and disposition of material. - Source COMDTINST M4400.17. Also defined by: "A
generic term which encompasses all those support activities associated with developing, acquiring,
testing and sustaining the mission effectiveness of operating assets throughout their service lives".
Logistics Delivery Elements. The individual components of the logistics delivery system which
enable provision of logistics services to the end user.
Logistics Delivery System. The complete system, comprised of the logistics infrastructure and the
single point of contact, which provides the requested logistics services to the end user.
Logistics Infrastructure. The collection of resources that deliver logistics support to platforms.
intended mission at a random point of time. Mathematically, it is computed as:
UPTIME
Ao = -------------------------------
UPTIME + DOWNTIME
Uptime is the time that the system is operationally ready. In engineering terms, uptime is stated as
the mean time between mission failure (MTBF). A mission failure is any item failure which
directly renders the system inoperable or unable to perform is assigned mission.
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