HALT Presentations
by Mike Silverman, CRE, Managing Partner, Ops A La Carte
HALT – What is it?
• Quickly discover design issues.
• Evaluate & improve design margins.
• Release mature product at market introuction.
• Reduce development time & cost.
• Eliminate design problems before release.
• Evaluate cost reductions made to product.
by Mike Silverman, CRE, Managing Partner, Ops A La Carte
Developmental HALT is not really a test you pass or fail, it is a process tool for the design engineers.
There are no pre-established limits.
by Peter Arrowsmith, Ops A La Carte LLC
Bojan Randjelovic, AB SCIEX
Billy Lee, Celestica
Product Overview
• Complex, high-end scientific instrument, combination of quadrupole (Q) and time-of-flight (ToF) mass spectrometers (MS)
• Lab applications include sensitive detection (sub-ppb) and identification of organic molecules, example uses: trace pollutants, drug metabolites.
• New MS System, announced in May 2010
Summary & Conclusions
As HALT takes only a few days to run and to implement its corrective action(s), and even if it takes a bit longer, this time would be far less than waiting for an RT to be run and to implement its corrective action(s). This paper discusses a mathematical model which can be a huge time and cost saver. By not performing life tests and simply doing an effective HALT, time and money will be saved.
A Method of Estimating Product Field Failure Rate from the Results of HALT – HALTPlus™
How to Move from HALT to HASS to HASA
HALT and HASS Summary
Highly Accelerated Life Testing (HALT) and Highly Accelerated Stress Screening (HASS) are two of the best reliability tools developed to date, and every year engineers are turning to HALT and HASS to help them achieve high reliability.
A presentation for the IEEE reliability Society April 27, 2005
HALT and ALT are two of the most popular testing methods but often times engineers are confused about whih to use when.
A presentation for the IEEE reliability Society April 27, 2005
HALT and ALT are two of the most popular testing methods but often times engineers are confused about which to use when.
Integrating HALT with the Medical Product Life Cycle
• HALT, how it works
— Stress
— Failure
— Analysis
— Improve
Integrating HALT with the Medical Product Life Cycle
Leading Indicators are a powerful new method being used during Reliability Testing. Leading Indicators:
• Can use HALT to Reduce Test Time
• Can be use to improve HASS
• Can be use as an alternative to HASS
In this presentation we will highlight a few of these significant risk areas and show how techniques such as HALT and ALT can assure that the transition has been accomplished successfully from the perspective of Reliability.
What Is HALT?
(and What Is Not HALT?)
By Mike Silverman, CRE, Managing Partner, Ops A La Carte
Reliability is no longer a separate activity performed by a distinct group within the organization. Product reliability goals, concerns and activities are integrated into nearly every function and process of an organization. Each organization must factor reliability into every decision in order to ensure produce a successful product.
The old Test-Analyze-and-Fix philosophies no longer have a place in today’s design process due to continuous cost reduction pressures and reduced design cycles. The motivation to implement a Design for Reliability (DfR) process include:
• Higher Demand for Reliability that cannot be achieved using previous reliability techniques
• Faster time to market
• More emphasis on reducing cost
• Fast moving technology, which creates new risks to development programs.
Successful implementation of the DfR process will reduce the product development cycle, lower the design cost, and improve customer satisfaction.
Reliability professionals these days are becoming more and more familiar with the term Design for Reliability (DfR). Increasing number of companies advertizeDfR as part of their design process and more and more web-based and life training is offered on the DfR methods. However, what truly is Design for Reliability• Despite the previous work done on this subject (see [1], [2] and [3]) DfR has not yet been fully defined. It is still a work in progress. In an attempt to clarify the subject of DfR this paper discusses what does and what does not constitute the Design for Reliability process and lays out the key steps in achieving a reliable design.
Since this term is often misused and misplaced, let us first define what the Design for Reliability is not:
• Making a list of all possible reliability activities and then trying to cover as many as possible within the timeframe of the product development process.
• Using only certain selected tools from the “DfR toolbox” (see Section 2 for more details)
• Assuming that product reliability is the sole responsibility of a reliability engineer (reliability engineer is the guide and mentor but not the owner -designer should be the owner).
• Completing the analytical work but delay test and verification until the system testing stage.
• Getting the product into test as fast as possible to test reliability into the product (Test-Analyze-and-Fix)
• Only working on the in-house design items and not worrying about vendor items
• Working in silos between Electrical, Mechanical, Software and other functional areas (even if they apply some or most of the DfR tools).
• Not looking at interactions between groups and not taking a system level viewpoint.
Design for Reliability (DfR) is an emerging discipline that refers to the process of designing reliability into products as opposed to the Test-Analyze-and-Fix philosophy, which unfortunately still exists in today’s design process. DfR encompasses several tools and practices and describes the order of their deployment that an organization needs to have in place in order to drive reliability into their products. Specifically, DfR is:
• A process which begins from the very early stages of the design and should be integrated into every stage of this process.
• Setting goals at the beginning of the program and then developing a plan to meet the goals.
• Having the reliability goals being driven by the design team with the reliability team acting as mentors.
• Providing metrics so that you have checkpoints on where you are against your goals.
• Writing a Reliability Plan to drive your program.
• The process which begins from the very early stages of the design and should be integrated into every stage of this process
• Using the best available science-based methods to achieve reliability.
