Using Sherlock Automated Design Analysis Software to benefit HALT Test Planning and Execution

Transcription

1 Using Sherlock Automated Design Analysis Software to benefit HALT Test Planning and Execution Presented By: Mr. Neill Doertenbach Senior Applications Engineer

2 Sherlock, HALT and HASS Working Together Different tools working together to meet the ultimate goal Increasing Reliability Decreasing warranty costs Increasing Customer Satisfaction

3 Sherlock, HALT and HASS Making Each Other Better HALT HASS

4 Increasing Challenges Reliability Engineering faces the same pressures that are driving the rest of the industry: Faster time to market = shorter test times Desire for improved accuracy Tighter budgets demanding reduced test costs

5 Increased Emphasis on Warranty Cost Reduction Companies are more aggressively addressing warranty costs Directly affects bottom line profitability 5

6 How Can Reliability Engineering Respond? More accurate FMEA/FMECA to improve reliability and reduce liability risks Faster results from Accelerated Life Testing (ALT) and Reliability Growth Testing (RGT) More accurate predictions of warranty costs through better MTTF/MTBF predictions 6

7 Sherlock, HALT and HASS Can Help Working together, these design tools will: Speed time to market Reduce design cycle time by reducing test time Reduce test costs by using fewer samples and less lab time Reduce warranty costs through improved reliability Minimize long term reliability costs and maximize MTBF with HASS 7 7

8 Earlier Detection and Correction = $$$ Save time and money when you can push corrective actions back further in design cycle Finding failures in HALT, before DVT, has always been beneficial Sherlock pushes fault detection back further, before hardware exists HALT goes faster with Sherlock implemented first Faster HALT means moving to HASS faster

9 The Rule of Ten for Error Correction Cost

10 Reducing Residual Risk The Cost of Unknowns is Unknown Variabilities in supply, intentional or unintentional design changes Use Sherlock and HALT to evaluate changes Use HASS to capture undetected variations and keep reliability high

11 The End Result New, previously unachievable levels of reliability in shorter time frames. Catch things you didn t catch before

12 The Power of Multiple Tools SPECIFIC ADVANTAGES BROUGHT BY SHERLOCK

13 HALT on Complex Multi-Board Assemblies HALT is most effective when testing lowest possible assembly level Most effective stress on assembly Sometimes, lower level assemblies can t be completely functionally tested Trade-offs are required

14 HALT on Complex Multi-Board Assemblies

15 Sherlock can Model Multi-Board Systems Testing in a non-end use configuration can influence failure modes. Sherlock models stresses on stacked boards, daughter cards and mezzanine cards

16 Sherlock can Model Multi-Board Systems

17 Sherlock can Reduce HALT Costs Failures found in Sherlock will be eliminated before HALT Fewer failure modes found in HALT, so fewer samples will be used, less failure analysis to do Particularly helpful with expensive or scarce UUTs Let Sherlock predict stress levels for catastrophic failure, then avoid them in HALT Let Sherlock verify corrective actions first Identify possible new failure modes before building new hardware

18 Failure Analysis After HALT One of the most important and time consuming aspects of HALT Understanding failure modes is essential As you learned last month, Sherlock can speed failure analysis Run what if s, evaluate effects of faults quickly to narrow down FA efforts

19 Found in HALT, Identifiable with Sherlock

20 Improving Sherlock with HALT Results Sherlock component models are user customizable When HALT identifies characteristics not in model, Sherlock can be tuned to improve model Avg Lower Operating Limit Avg Lower Destruct Limit Avg Upper Operating Limit Avg Upper Destruct Limit -48 C -66 C 92 C 108 C Limits this far outside of specification may not be reflected in Sherlock models Average limits found in 47 HALT tests in Qualmark s ARTC labs

21 Using Sherlock in HASS Implementation HASS gives the highest possible benefit from HALT/HASS Technologies The faster you can get through HALT, and the faster you can get HASS implemented, the more value you get Sherlock can help speed HASS Proof of Screen Use Sherlock to predict end of life at given HASS stress If confirmed in test results, fewer cycles and fewer units will be necessary for Proof of Screen

22 HASS Implementation Proof of Screen Safety Profile

23 Sherlock can Provide a Second Opinion on Safety of Screen Sometimes there are residual concerns about the stresses used in HASS, in spite of the evidence provided by Proof of Screen. A second source of safety information can help resolve this. Sherlock HASS Image credit: HR Morning

24 Learn More by Using More Tools Overall reliability is most improved when all techniques are used HALT provides operational information that is beyond the capabilities of Sherlock Sherlock evaluates fatigue and end of life due to mechanical stresses HALT evaluates operational limits, finds soft failures HASS provides ongoing confirmation of product reliability

25 Sherlock is only as good as the model If a vendor has process issues or uses incorrect or counterfeit components, Sherlock won t show this Requires adherence to the little known standard, MIL-TD-1111 Make It Like - The Drawing (For Once!)

26 Gain the Advantage of a Second Check Two chances to find a design issue BEFORE your customer does!

27 Use all the Tools at Hand to Make the Best Product Possible Increased confidence in Sherlock predictions, HALT results and HASS effectiveness Increased confidence in the reliability of your product

28 Thank You! Neill Doertenbach Senior Applications Engineer

29 Questions?