HALT & HASS

March 9, 2016

Host: Ops A La Carte
Speaker: John Cooper, Senior Reliability Engineer
Time: 12:00pm-1:00pm Pacific Time
Register:
https://attendee.gotowebinar.com/register/8806845518889777665

Many of us are involved in HALT testing; sometimes we wonder if we are doing it correctly or why it is done a certain way. Some of us may not understand it and would like a basic review.

This webinar will include an introduction to HALT, an understanding of what it will do, and what it will not do, and how to plan for it. We will explore fixturing, setup, functional verification, and the actual running of the test. We will discuss the real value of HALT.

Advanced topics will be touched on such as pitfalls of HALT, how it can be misunderstood, and some case studies.

Tune in to this webinar for a refresher; invite your associates, such as design engineers or project managers, who would appreciate understanding HALT and might have questions.

To Register and for more info, please call 408.654.0499, x203

We look forward to seeing you at all of our events!

Jay and all the Ops Staff

FREE RELIABILITY EVENT

1) July 9, 2014: FREE Webinar 12-1pm PST

https://www2.gotomeeting.com/register/730065394

Title: HASS Screening Effectiveness: How do you know?
Speaker: Jim McLinn
Date: Wednesday, July 9, 2014 (12-1pm PST)

How does one know if HASS derived from HALT is effective? HALT and HASS find design and manufacturing flaws and failures. The bigger question is does HASS really prevent a substantial number of field failures? Secondly, what are the economic limits when conducting HASS?

This webinar will explore two different real world examples.

About the Speaker (James McLinn, CRE, CQE): James has 30 years of experience in high tech reliability, testing and management, in startup companies and companies such as Teradyne and Beckman Coulter. He has worked in appliances, consumer electronics, military, and biomedical development. His experience includes overall product quality and reliability strategy, Design and Process FMEA, reliability testing, QALT, HALT and HASS, reliability modeling, manufacturing test, quality control, and compliance engineering. He has taught reliability classes, and has managed various reliability, test and manufacturing groups.

by Mike Silverman

Sept 12, 2013: 12:00pm EST / 9am PST

HALT began 40 years ago with a simple idea of testing beyond specifications in order to better understand design margins. Over the past 40 years, thousands of engineers around the world have been exposed to the concepts of HALT and have tried the techniques.

Find out more and Register here.

We are pleased to announce that our HALT Calculator is now available as a cloud-based application so you can access it direclty whenever you need. We also have a Paypal payment system in place on-line for quicker access.

With the cloud application, we are also offering either pay by use (you can order as many use credits as you’d like) or yearly subscriptions. The yearly subscriptions work great when you have your own chamber or when you perform many HALTs a year and you would like to run the calculator during HALT planning to set must meet criteria, or when you are in the middle of the test and trying to determine which failures to fix and continue testing.

Now Chart is offering our HALT Calculator as on option when they sell a chamber.

Here is the internet version of our HALT Calculator.

When we think of HALT, we think of HALT Chambers and the stresses they provide – cold temperature, hot temperature, rapid thermal transitions, vibration stress, and combined thermal and vibration environments.

We need to expand our thinking of HALT into meaning any stress that can accelerate finding defects (in other words, to find design weaknesses before your customers find them).

Many other stresses can be used for HALT including: ESD, drop testing, bend testing, water ingress testing, and more. In this presentation, we will explore some of the HALT stresses we can apply in addition to temperature and vibration.

We will also explore some misuses of typical HALT chambers and how HALT practitioners believe just because they are using HALT chambers, they think they are performing HALT. If you are not performing HALT with the intention of discovering and expanding product margins, you are not performing HALT no matter what equipment you are using. In this presentation, we will explore some of the common errors HALT practitioners make that takes them off the path of performing HALT.

By: Mike Silverman

This blog is part of a presentation to be given by Mike at the annual Accelerated Stress Testing and Reliability (ASTR) Workshop in Denver Oct 6-8. Presentation will be posted on Ops A La Carte’s website under technical presentations.

Free Webinar: A Faster, Cheaper Method for Determining Product MTBF – the HALT AFR Calculator – Friday, Nov 6, 9am PST

Register at https://www2.gotomeeting.com/register/523479043

Background:

The Field Failure Rate Calculator is a patent pending mathematical model that, when provided with the appropriate HALT and product information, will accurately estimate the product’s field inherent AFR or Actual Failure Rate.

Vocabulary: MTBF is Mean Time Between Failure, AFR is Actual Failure Rate, HALT is Highly Accelerated Life Testing used in design engineering to improve product robustness, HASS is Highly Accelerated Stress Screening using in manufacturing to reduce infant mortalities, HASA is Highly Accelerated Stress Auditing which is an audit form of HASS. Go to www.opsalacarte.com and google those terms for more details.

On October 8, 2009, Ops A La Carte announced their Field Failure Rate Calculator. Ops A La Carte will be hosting a FREE webinar on Friday November 6th 9am PST to demonstrate the tool. For more information on this event, go to http://www.opsalacarte.com/Pages/news/news_events.htm.

The methodology has been used on a number of products with significant positive financial results. This model will also provide HASS or HASA data for the detection of an outgoing quality process shift in time from a stated AFR.

It is a patent pending Excel-based mathematical model that, when provided with the appropriate HALT and product information, will accurately estimate the product’s field AFR or Annual Failure Rate. It has been validated on over thirty products from diverse manufacturers and design environments.

The model will also provide HASS or HASA time to detect a shift in the desired outgoing failure rate.

Here are a few reasons for why and when this model should be used:

• Eliminates the need for prolonged life tests (typically several months long) which will save on development cost, space, and effort. HALT takes only a few days to run and the calculator only takes a few minutes, so the time and cost savings over typical life tests is huge.

• Quickly & accurately estimate field failure rate or Mean Time Between Failure (MTBF).

• More accurate than standard reliability predictions.

• This tool provides accurate estimates of field AFR before launching the product. This can help assure you will meet/exceed your customer expectations and allows you to accurately forecast warranty expenditures.

For more details, go to http://www.opsalacarte.com/Pages/reliability/reliability_prot_halt_calculator.htm

We uploaded a video of our HALT Vibration Table in Slow Motion.

You can actually see the different axes of vibration. Check it out at http://www.youtube.com/watch?v=l-mBFtFW7Ds.

This video was taken on a Qualmark 3.0 Typhoon table using a high speed video camera.

You are watching approximately 1.5 seconds of video expanded out to over 2 minutes. Look at how the board is flexing and moving in several different directions.

May I know why is humidity stress seldom used in HALT testing ?

Isn’t humidity is a commonly used stress that goes together with temperature during ESS ?

From: Vincent Lee, Singapore

Harry McLean’s book “HALT, HASS, and HASA Explained: Accelerated Reliability Techniques” will be released in the next few weeks. You can pre-order at:

HALT, HASS, and HASA Explained: Accelerated Reliability Techniques

This is planned to be a 6 x 9 hard cover, priced at $39/members of ASQ and $65/list.

In this author’s opinion, it is one of the best books written on the subject and I highly recommend it.