Relex Reliability Software “the intuitive solution!” Relex Software Corporation 1

Relex Maintainability Prediction 2

Supported Standards  General Maintenance Procedures  MIL-HDBK-472 Procedures 2, 5A or 5B

4 Maintainability Prediction What? Analysis of system for repair and maintenance Why? Why?  Increase system availability  Identify areas for improvement

5 Relex Maintainability  Framework for maintainability analysis  Integrated with the other Relex modules  Storage for tasks and FD&I outputs

6 Purpose of Maintainability Prediction  To calculate maintainability parameters  To aid in developing maintenance plans  To determine time required for repairs

7 Relex Maintainability Relex Project Database Input Format File Tasks File FD & I Output File Used Defined Values File Maintainability Groups File Report Format File

Relex Maintainability Analysis

9 Step-by-Step Process 1. Define simple one-step (basic) tasks 2. Include all fault detection and isolation that is accomplished that is accomplished 3. Enter maintainability data 4. Perform calculations, generate reports

10 Structuring the Data Levels of data in Relex Maintainability Prediction:  Basic Maintenance Tasks  Super Maintenance Tasks  FD&I Outputs  Maintainability Analysis

11 Basic Maintenance Tasks  Simple, one-step tasks  Stored in a Tasks File  Includes tasks with repair times  MIL-HDBK-472 Tasks file

12 Example Basic Tasks  Remove a Screw  Strip a Wire  Clean Surface  Replace Lamp/Light

13 Super Maintenance Tasks  Combinations of basic tasks  Also called a “Maintenance Action”  Stored in a Tasks File (includes subtasks and subtask quantities)

14 Example Super Tasks “Replace a Video Card”  Removal of Screw  Removal of Card  Replacement of Card  Replacement of Screw

15 FD&I Outputs  Fault Detection and Isolation Outputs  Defined as “those indications, symptoms, printouts, readouts, or the results of manual procedures which separately or in combination, identify to the maintenance technician the procedure to be followed”

16 FD&I Outputs Stored in an FD&I Outputs File  Includes list of tasks to be performed  Tasks are basic or super tasks

17 Example FD&I Output  Replace Circuit Card A1  Replace power supply  Blank monitor

18 Maintainability Analysis  Stored in a Project file (Maintainability tab in Parts Table window)  Store maintenance/repair data for system  Repairable items with associated data  FD&I Outputs associated with repairable items

19 Review - Levels of Data  Enter basic tasks  Create super tasks from basic tasks  Create FD&I outputs from tasks  Enter maintainability data

20 Maintainability Prediction 1. Create customized Value-Added files 2. Create the Project file 3. Enter the System Tree structure and associated parts associated parts 4. Enter maintainability data 5. Calculate and generate reports

Relex Demonstration