Diagnostic process

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Diagnostic process

  1. 1. Unit 14 Technical Fault Diagnosis and Remedy The Diagnostic Process
  2. 2. The Diagnostic Process <ul><li>The diagnostic process is when you find faults in a structured manner. </li></ul><ul><li>A Structured manner means you follow a set of instructions which lay out what to do, which order to do it in and how to respond. </li></ul><ul><li>We often use a Systematic Approach… </li></ul>
  3. 3. The Diagnostic Process <ul><li>A Systematic Approach will take more time but will be more thorough. </li></ul>
  4. 4. The Diagnostic Process <ul><li>A Systematic Approach? </li></ul><ul><ul><li>A sequence to be followed step by step. </li></ul></ul><ul><li>A Systematic approach will allow you to check interrelated parts without missing something. </li></ul><ul><li>Will allow someone else to take over from you if necessary. </li></ul>
  5. 5. The Diagnostic Process <ul><li>Fault Diagnosis Methods </li></ul><ul><ul><li>Substitution </li></ul></ul><ul><ul><li>Replication </li></ul></ul><ul><ul><li>Testing </li></ul></ul><ul><ul><li>Environment Change </li></ul></ul>
  6. 6. The Diagnostic Process <ul><li>Substitution </li></ul><ul><ul><li>A part is swapped with another that is known to work. The part could be a complete system. </li></ul></ul><ul><ul><li>Substitution can provide a very quick resolution to the problem. </li></ul></ul>
  7. 7. The Diagnostic Process <ul><li>Replication </li></ul><ul><ul><li>Where a fault is duplicated elsewhere in a controlled manner. This way you know exactly what the cause is and can explain it. </li></ul></ul><ul><ul><li>Usually takes place in the ICT Support area. </li></ul></ul>
  8. 8. The Diagnostic Process <ul><li>Testing </li></ul><ul><ul><li>Every ICT job should be tested afterwards to ensure it works as expected. </li></ul></ul><ul><ul><li>This area will be explored in more detail later. </li></ul></ul>
  9. 9. The Diagnostic Process <ul><li>Environment Change </li></ul><ul><ul><li>Faulty equipment is moved to another place for testing. </li></ul></ul><ul><ul><li>Eg if a computer does not log on to a network move it to a another point to see if it will work there. </li></ul></ul><ul><ul><li>Testing in a different environment is always useful as the difference can be looked to see if there is a trigger. </li></ul></ul>

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