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⟦44cfc78a0⟧ Wang Wps File
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Derivation
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WangText
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/…09…/…0e…/…86…1 …02… …02… …02…
…02…CPS/PLN/004
810527
R&M PROGRAM PLAN
…02…ISSUE 2…02…CAMPS
TABLE OF CONTENTS
1 SCOPE ........................................
4 to 5
1.1 APPLICABLE DOCUMENS .....................
4
1.2 REFERENCED DOCUMENTS .....................
5
2 TERMS AND DEFINITIONS ........................
6 to 8
2.1 ACRONYMS ..................................
8
3 PLANNING SUMMARY ............................
9 to 15
3.1 R&M PROGRAM TASKS ........................
10
3.1.1 R&M Analysis ..........................
11
3.1.2 RMA Reports ...........................
13
3.1.3 Failure Reporting and Control .........
13
3.1.4 Failure Analyis ...................... 14
3.1.5 Monitoring of Software Defects ........
14
3.2 ORGANIZATION .............................
14
3.3 SCHEDULES ................................
14
4 CAMPS R&M ANALYSIS ...........................
16 o 81
4.1 GENERAL ..................................
16
4.1.1 Failure Definition ...................
16
4.1.2 Equipment Functions ..................
17
4.1.3 Failure Independence .................
17
4.1.4 Failure Detection nd Localization ... 18
4.1.5 Module Replacement ...................
18
4.1.5.1 Processor Assembly ................
19
4.1.5.2 Channel Assembly ..................
19
4.1.5.3 TDX Assembly ......................
19
4.1.5.4 Wathdog Processor Assembly ....... 20
4.1.6 Applied Redundancy ....................
20
4.1.7 Stress Parameters .....................
23
4.1.8 CAMPS Modes of Operation ..............
23…86…1 …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02…
4.1.9 Equipment Meantime Between Failure
(MTBF) .................................
23
4.1.10 Equipment Maintainability (MTTR) .....
26
4.1.11 Predicted Availabiliy ...............
28
4.1.11.1 System Status and Control,
Matematical Model ................
30
4.2 R&M MODELING ..............................
31
4.2.1 Availability and Reliability Require-
ments ................................
32
4.2.1.1 Individual User Connecting Points .
32
4.2.1.2 Groups of User Connecting Points ..
32
4.2.1.3 User Connecting Points to Super-
visory and Service Terminals ......
33
4.2.1.4 External Channels nd Circuits ....
33
4.2.1.5 Individual Channels ...............
33
4.2.1.6 Groups of Channels ................
34
4.2.1.7 All Circuits, Channels and User
Connecting Points .................
34
4.2.2 R&M Models ...........................
35
4.2.2.1 Model 1: Central Processor Assy ...
37
4.2.2.2 Model 2: Channel Unit Assy and
Storage ...........................
37
4.2.2.3 Model 3: TDX Bus System ...........
37
4.2.2.4 Model 3B:"LTUX-Chain" ............
37
4.2.2.5 Model 4A: Individual User Connec-
ting Points .......................
37
4.2.2.6 Model 4B: Individual External
Channels ..........................
37
4.2.2.7 Model 5A: ServiceCommon to Groups
of User Connecting Points .........
38
4.2.2.8 Model 5B: Service Common to Groups
of External Channels ..............
38
4.2.2.9 Model 6A: Service Common to 75% of
User Connecting Points ...........
38
4.2.2.10 Model 7: Service to All Circuits,
Channels, and User Connecting
Points ............................
38
4.2.2.11 Model 8: SS&C System ..............
38
4.2.2.12 General Comments to Tables 4.2.2.-1
to
4.2.2-12
.......................
38
4.3 DESIGN CHANGES ............................
81
4.4 R&M TESTING ...............................
81
5 RMA REPORTS ...................................
82
6 FAILURE REPORTING AND CONTROL .................
83
7 FAILURE ANALYSIS ..............................
84
8 MONITRING OF SOFTWARE DEFECTS ................
85…86…1 …02… …02… …02… …02…
1̲ ̲ ̲S̲C̲O̲P̲E̲
This document describes the activities which have to
be instituted and reviewed throughout the implementation
of the CAMPS program.
The objectives of the reliabilit program for the CAMPS
system are:
1) To ensure compliance with the reliability requirement
as stated in CPS/210/SYS/0001 sec. 3.4.4.
2) To assist design configuration selection decisions.
3) To give early identification of potential reliabilty
problem areas and guidelines to their solution.
4) To provide the basis for the availability and maintainability
verification.
The R&M Program Plan provides a planning summary with
a description of all the R&M Tasks in form of Work
Packages nd task schedules.
In addition, the plan provides an R&M model for each
of the reliability requirements specified in the System
Requirements Specification. The models are updates
to the models presented in the CAMPS proposals.
The models use prdicted values of MTBF and MTTR for
the CAMPS hardware modules, where a module is the lowest
replaceable unit at site level.
1.1 A̲P̲P̲L̲I̲C̲A̲B̲L̲E̲ ̲D̲O̲C̲U̲M̲E̲N̲T̲S̲
The cited documents are applicable only to the extent
specified in the text of the plan.
1) PS/SDS/001, CAMPS SYSTEM DESIGN SPECIFICATION,
Preliminary Issue, 810115
2) CPS/210/SYS/0001, CAMPS SYSTEM REQUIREMENTS,
Issue 2, 801124.…86…1 …02… …02… …02… …02… …02…
1.2 R̲E̲F̲E̲R̲E̲N̲C̲E̲D̲ ̲D̲O̲C̲U̲M̲E̲N̲T̲S̲
MIL-HDBK-217C Reliability Design Handbook
MIL-HDBK-1521A (USAF) Technical Reviews and Audits
for Systems, Equipments, and Computer
Programs
MIL-STD-71B Reliability Tests: Exponential Distribution
MIL-HDBK-472 Maintainability Prediction
CPS/PLN/006 Maintenance Plan for CAMPS
MIL-STD-833
Level B Test Methods and Procedures for Microelectronics
2̲ ̲ ̲T̲E̲R̲M̲S̲ ̲A̲N̲D̲ ̲D̲E̲F̲I̲N̲T̲I̲O̲N̲S̲
In interpreting specification and verification sections
in this plan on reliability and availability the following
terms shall apply:
a) A̲v̲a̲i̲l̲a̲b̲i̲l̲i̲t̲y̲ The probability of finding an item
(system, module, unit and part thereof) in a functioning
condition at a given time.
b) C̲o̲r̲r̲e̲c̲t̲i̲v̲e̲ ̲M̲a̲i̲n̲t̲e̲n̲a̲n̲c̲e̲. The maintenance undertaken
to restore an item to a specified condition after
a failure has occurred
c) D̲o̲w̲n̲ ̲T̲i̲m̲e̲. The time during which any of the facilities
or functions to be provided by the item is not
available, for whatever reason.
d) F̲a̲i̲l̲u̲r̲e̲. The inability of any item to carry out
its specified function within the tolerance allowed
und
