HALT & HASS Information
We’ve compiled these resources to give you some background on HALT & HASS, what they are, why they’re used and how they can help you improve your product.
Written by Dave Rahe of DLi. labs & Qualmark’s Senior Application Engineerings, this paper outlines the first HALT & HASS Standard of its kind – IPC 9592A : Requirements for Power Conversion Devices for the Computer and Telecommunications Industries. The History of IPC and IPC 9592A In 1957, the... More »
The Calculation of gRMS, by Neil Doertenbach, from Qualmark Corporation describes the process of calculating gRMS values when using a repetitive shock table used in Qualmark’s line of HALT chambers. gRMS is typically used to specify and compare the energy in repetitive shock vibration systems. Introduction What is gRMS?
HALT & HASS Technical Paper – COTS Journal September 2005 :: Ralph Poplawsky, Chief Technology Officer, QualMark Corporation. A lack of standards for the correct implementation of the stress test techniques known as HALT and HASS has resulted in widespread confusion. When implemented correctly, HALT and HASS provide a fast, cost-effective path to... More »
HALT is an effective tool used during product development to stimulate design weaknesses into failure modes, where they can be diagnosed, and corrected before the product is introduced to mass manufacturing. In addition, HALT will identify the weakest points in a system or product that requires ‘ruggedizing’ to... More »
Highly Accelerated Stress Screening (HASS) is the ideal tool for both qualifying product changes, and monitoring the reliability throughout a products life. Engineering was fraught with poor quality components in the early days, but this is no longer the case, and therefore traditional production screens that originally identified... More »
This paper analyzes HALT & HASS data from 33 different companies from a variety of different industries and illustrates that HALT can be applied to a very wide range of products, including both electrical and electro mechanical. Written by Mike Silverman. Abstract Accelerated reliability testing is one of... More »
The decision whether or not to perform AST on a specific product is a typical example of the quality vs. cost problem which many companies struggle. Unfortunately, reliability data is never available until several months or even elapsed, if at all. This paper will examine the economics of... More »
The purpose of this paper is to communicate the numerous successes that have resulted from HALT, HASS, and other environmental testing used by IBM’s Web Server division in Beaverton, Oregon. Written by Anthony T. McCray of IBM. Abstract The purpose of this paper is to communicate the numerous... More »
This brief paper is a condensation of the methods taught by the author and inventor of the methods in the seminar HALT and HASS. This paper is not intended to be complete, but to be an introduction to the concepts and to allow one to determine if the seminar... More »
This paper focuses on the ability to locate, isolate, and diagnose faults in the firmware and software of networking equipment. Provides specific examples of failures found at Allied Telesyn during HALT in the development phase. Written by D.Johnson & K.Franks. Abstract The establishment of Allied Telesyn’s Highly Accelerated... More »