HALT and HASS testing were first introduced to the manufacturing world in the 1980s as a way to test products to better understand how well they will stand up to the test of time. The theory behind them is that by testing using these processes manufacturers can quickly gain information regarding the reliability of a new or updated item. Because of this ability both of these testing techniques have been deemed ideal in the manufacturing and designing of many commercial grade products. HALT and HASS make use of many different methods to subject the test product to the stresses and strains that it might experience over its lifetime. These methods involve the use of direct injection liquid nitrogen cooling followed by many kilowatts of electricity to create massive amounts of heat. Special multi axis, broad spectrum vibration devices are used to shake, rattle and bounce the product around in ways that simulate damage much more effectively than standard life testing does. Because there is no true industry standards per se when it comes to HALT and HASS testing these extremely powerful test methods can be used to create major stresses on a product that are intended to rapidly force any flaws to occurs and then make them turn into failures which can save a manufacturer millions in wasted product design and manufacturing time. However if these test methods are not applied properly it can easily result in damaged products and information that can leave the engineers confused and frustrated.

Of the two tests HALT and HASS: HALT is a testing process that is generally reserved for new products that are still in the design phase and is usually performed during the pilot or preproduction phase. During HALT testing the product is subjected to an ever increasing level of stress until any weak points in the design are uncovered. These weak points can then be studied by the design engineers so that they can be analyzed and the design of the product modified to ensure that the flaw has been removed. The average HALT test can take anywhere from 3 to 5 days to complete and requires the use of an HALT chamber. Unlike HALT, HASS is used as a production screen and is used to test 100% of production units. HASS does use similar testing process as HALT, but at much lower levels to test how well a production unit will stand up to the test of time. Before any product can be submitted for HASS testing it must already have undergone and passed HALT testing.

Of the two tests HALT is the most common test performed on most products before they are marketed. If you wish to use HALT and HASS testing to help ensure the quality of the products you manufacture, you need the services of a company that specializes in this form of testing. Reliability Help under the management of Ted Kalal have the equipment, knowledge and experience to train your staff to test any of your products using both testing processes. Not only does this ensure that your products are ready for market but can save you large amounts of money in wasted R&D time.