Techincal Standards:

MIL-HDBK-217F
MIL-STD-1629A
EN IEC 60812
EN 12100
IEC 61882
OSHA 1910.119
EN 50126
ISO 14224

Integrated Logistic Support (ILS) - RAMT&S Analysis

RAMTS stands for the 5 main branches of logistics engineering studies: Reliability, Availability, Maintainability, Testability and Safety.

As set forth in UNI 10147, this means:

  • R – Reliability of a system: the probability that the system will operate in the predetermined ways, as per the operating specifications, for a given period of time, under the specific prescribed operating conditions;
  • A – Availability of a system: probability that the system, at a given time, is capable of performing the predetermined functions, as per the operating specifications, under the prescribed operating conditions, assuming that the appropriate maintenance necessary to maintain it has been ensured;
  • M – Maintainability of a system: property of a system to be maintained, defined as the probability that an active maintenance action can be performed during a given time interval, under given conditions, through the use of prescribed procedures and means. In general, the qualitative requirements of maintainability are traceable to accessibility, extractability and manipulability.
  • T- Testability of a system: property of the system to be able to be tested and / or test automatically and independently some of its functions, which establish the so-called levels of diagnostic capability of possible failures and malfunctions critical (and / or not critical) for the operation of the system itself.
  • S- Safety of a system: ability of the system to be used, maintained, regulated in conditions of greatest possible safety for the operators, guaranteeing adequate measures of protection and the possibility of avoiding as much as possible failures or malfunctions that can involve conditions of risk of injury.

The concept of Integrated Logistic Support is related to the capacity of a system to perform as expected in terms of operative life and safety: by predictive design analysis (i.e. based essentially on inductive or deductive analysis of the effects of failures, malfunctions, errors in use or aggression to the system) we want to determine how likely the system will be able to perform its mission, and this in the foreseen levels of reliability, maintainability, availability and safety well defined and throughout the life cycle of the product.