REALIBILITY

REALIBILITY

1. 1. INTRODUCTION

   • will perform its intended function satisfactorily
   • for a prescribed life

2. 2. FACTOR AFFECTING

   • intended function
   • intended life
   • enviromental condition

3. 3. SYSTEM REALIBILITY

   • series arrangement
     • one fail,another will fail
     • R=(Ra)(Rb)(Rc)
   • parallel arrangement
     • R=1-(1-Ra)(1-Rb)(1-Rc)
     • one fail,another still function

4. 4. FAILURE RATE CURVE

   • no of test failure/sum of test times
   • types of failure
     • time terminated w/o a replacement
     • time terminated w replacement
     • failure terminate
   • mean time between failure
     • bathtub curve

5. AVAILABILITY

6. MAINTAINABILITY