last modified: 20-MAR-1987 | catalog | categories | new | search |

NEA-1076 AVACOM-ETARP.

AVACOM-ETAP, Availability and Element Transient and Asymptotic Repair Process

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1. NAME OR DESIGNATION OF PROGRAM:  AVACOM-ETARP.
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2. COMPUTERS
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Program name Package id Status Status date
AVACOM-ETARP NEA-1076/01 Tested 20-MAR-1987

Machines used:

Package ID Orig. computer Test computer
NEA-1076/01 AMDAHL 470/V8 IBM 3084
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3. DESCRIPTION OF PROGRAM OR FUNCTION

In reliability theory, the term "availability" generally indicates the probability of the proper functioning of a system or of a component at a general time t when various possible replacement or repair policies are considered. AVACOM-ETARP calculates the transient and asymptotic availability of a component subject to a repair process with generic failure and repair laws. Five of the most commonly used distributions have been  included as options: exponential, normal; lognormal; gamma; Weibull.
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4. METHOD OF SOLUTION

The used mathematical model considers the failure-restoration process as a 2-state non-homogeneous Markov process containing the homogeneous Markov one as a particular case.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
NEA-1076/01
NEA-DB executed the test case included in this package  on an IBM 3084 computer in 15.25 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NEA-1076/01 20-MAR-1987 Tested at NEADB
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10. REFERENCES

- S. Garibba, G. Reina, G. Volta:
  "Repair Processes: Fundamentals and Computation"
  EUR 5232e, 1974
- S. Garibba, G. Reina, G. Volta:
  "Availability of Repairable Units when Failure and Restoration
  Rates Age in Real Time"
  IEEE Trans. on Reliability, Vol. R-25, no 2, June 1976
NEA-1076/01, included references:
- G. Reina:
  AVACOM-ETARP: Availability Computation, Element Transient and
  Asymptotic Repair Process.
  Technical Note No.I.06.01.82.05 (Jan.1982)
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11. MACHINE REQUIREMENTS:
NEA-1076/01
To execute the test case on an IBM 3084, 316K bytes of  main storage are required.
required
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1076/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
NEA-1076/01
VS2 03.8 (IBM 3084).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The program is organised in such a way that it can be used as a sub- program in general reliability codes.
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15. NAME AND ESTABLISHMENT OF AUTHORS

   G. Reina:
   Commission of the European Communities
   Joint Research Centre
   ISPRA Establishment, Italy
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16. MATERIAL AVAILABLE
NEA-1076/01
File name File description Records
NEA1076_01.001 information file 49
NEA1076_01.002 AVACOM-ETARP Source Program 408
NEA1076_01.003 AVACOM-ETARP Test Case Input Data 6
NEA1076_01.004 AVACOM-ETARP Test Case Printed Output 601
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis
  • P. General Mathematical and Computing System Routines

Keywords: failures, reliability.