The home of HALT and HASS

Accelerated Reliability Training

The famous How-To Seminars on Accelerated Reliability that teachers, engineers, and managers have been speaking about.

Dr. Hobbs invented HALT (Highly Accelerated Life Tests) and HASS (Highly Accelerated Stress Screens). These techniques use severe conditions to test for weaknesses in design. The breakdowns and parts failures that will occur after several years in average conditions, happen in a matter of minutes or even seconds using HALT and HASS, so designers and manufacturers can find problems and fix them quickly.

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What’s the difference between HALT and HASS?

HALT is run during the design phase of a program to find design weaknesses and eliminate them. Any stress that exposes design weaknesses that would show up in the normal environments is suitable even if these stresses do not occur in the normal environments to which the product will be exposed. This is due to the crossover effect.

HASS is run during production in order to find process problems such as poor solder joints. Again, time compression techniques and the cross over effect are employed to speed the process and to reduce costs. Tests called Safety of Screen are run to prove that the HASS profiles leave enough life in the product.

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Hobbs Engineering was established in 1978 by Dr. Gregg K. Hobbs, who earned a doctorate in structural dynamics and held 14 patents for various inventions that test the durability of product design.

For more than 30 years, he gathered a select group of specialists in the various aspects of Accelerated Reliability, who provide training seminars for manufacturers in every industry, from Avionics, Computers, Consumer Electronics, Telecommunications, Defence, Medical, Oil and Gas. These instructors provide seminars, webinars and consulting in the field of reliability improvement.



Hobbs Engineering offers a wide variety of seminars, offered as Open Seminars at various locations throughout the year.  If you are interested in hosting an open seminar at your facility, please contact us.  In return for hosting you would be able to send one person from your company at no charge.  We can also do In-House seminars at your facility for your employees, providing training tailored to your specific needs. If you have more than a few people to be trained in reliability improvement, then in-house seminars are the best way to achieve this.


Hobbs Engineering offers webinars in addition to our regular seminars. These Accelerated Reliability Webinars are taught live by our highly knowledgeable instructors. You can contact us to get a link to past webinars that have been recorded or watch this website for future ones. The cost of these webinars vary, please contact Hobbs Engineering for specific pricing.

We also provide private corporate webinars.  This allows your company the opportunity to discuss key issues with the instructor in confidence.  You can also select the date and time. Contact us for details and pricing


In these times when there are heightened concerns about finances, many companies frequently find themselves short of staff. Even if your company cannot hire new people, they may want to bring in a consultant to take care of your short term needs. Our instructors are very knowledgeable and certainly can be of assistance. Hobbs Engineering provides consulting services to companies all over the world. Our instructors / consultants are experts in their field and have a wide knowledge of their subject matter. Please see detailed information on each instructor under the “Our Instructors” tab. The overall impact of a consultant is that clients have access to deeper levels of expertise than would be feasible for them to retain in-house and may utilize only as much service from the outside consultant as desired. We offer both in-house consulting where the instructor comes to your facility and also remote consulting where the instructor works from his location. When people have in-house seminars, they frequently request a day or two of consulting. The prices may vary some with the consultant, but our basic price is $2,350 per day plus expenses for in-house consulting and the consultant off-site at $250 per hour.

The Only Stop You’ll Have To Make To Meet Your Technical Needs

 Our simple yet powerful Webinars allow you to interact with our top Instructor’s. Can’t make it to a live Webinar? No Worries! You can always watch later, just order from our Webinar list and watch (VOD)


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We know that many people cannot travel for seminars; and for this reason, we now are offering webinars so that you can be educated at your desk. See our calendar for upcoming webinars, and our listing’s under the,  “WEBINAR” tab for those that have been recorded and available for you to purchase.


We have over 20 webinars to choose from, and more are being added monthly,  on subjects like…Understand Shock and Vibration, Back To Basics Halt & Hass, Basic Reliability Statistics, and so many more!


We are overflowing at the seams with, “Advanced Material” not only from our webinars, but also we have a large array of, “Technical Articles” written by some of the best leaders of industry, so don’t forget to check them out.



We have Seminars ranging from 1 day to 4 days to meet your educational needs. Don’t forget to see our calendar of events.

Carl Schmuland, Sr. Principal Reliability Engineer “To test the effectiveness of the HALT/HASS procedure, we selected our most significant instrument and removed the corrective actions we had implemented. We then performed the HALT process and were pleased to discover that in about 20 hours of test time it identified all major issues that had required hundreds of hours of testing using traditional methods to discover. As a result of this experiment, we have… recently purchased our own machine.”

Kevin Carpenter, Contract Engineer at a major defense company. “This is the best presented and potentially most useful training any company has sent me to in my 23 years of engineering.