DRBFM

Design Review Based on Failure Modes (DRBFM) is a tool developed by the Toyota Motor Corporation based on the philosophy that design problems occur when changes are made to engineering designs. The idea is to make changes from a previous, proven design highly visible and explore concerns, causes and impacts of that change. The points of change, according to the DRBFM theory, are the source of future failures.

Thursday, October 06, 2005

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Wednesday, October 05, 2005

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.: "Good Dissection
The objective of good dissection is to examine results of validation testing. Make your mistakes visible. This examination is applying the DRBFM to another concept, Design Review Based on Test Results (DRBTR).
When applying DRBTR, we must, wherever possible, observe the test failure. DRBFM encourages the designer, through careful discussion with cross functional (multiple perspective) participation, to look at a design to discover problems or weaknesses with the design and share the information. DRBTR has the designer observing actual test pieces and discussing test results in open discussions during design reviews. These reviews can take place at the OEM or a supplier's facility.
When dissecting test results, one must use the results to determine if it is the most effective means to find problems. We must analyze the type of test and ensure it is appropriate. Finally, when discussing test results one must determine if there are other problems, if the test was proper, or if it is best to change the design based on results? "

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.: "Good Discussion
Concentrate on the proposed changes to a design. If a proven good design is applied to future products the risk of failure is low. If changes are made to the existing design, the potential for failure exists.
Do not trivialize the changes. Work to understand the changes. Mr. Yoshimura advises validation testing can identify design weaknesses, but, why wait until validation testing is done to identify the failure? Good discussions held at preliminary design reviews can achieve the same result. The good discussion Mr. Yoshimura refers to is DRBFM.
The analysis for DRBFM is modeled after the standard column worksheet developed for Failure Mode and Effects Analysis (FMEA). Although the initial concept of DRBFM was intended to distance itself from FMEA, due to its bad reputation, Mr. Yoshimura recommends using the DMFEA format if a company has a good FMEA process. It's not the form, it's the analysis. DRBFM returns the risk analysis to its roots.
A prerequisite for the DRBFM is a comprehensive, well-done FMEA. Then, a DRBFM is to be conducted for every design change.
The DRBFM is intended to make the changes visible by discussing, at length, every possible concern and cause that can result in failure. The FMEA's reputation has suffered due to so many efforts to automate it. How many meetings do you think we'll need? How long will the meetings be? Can we speed this up? The emphasis on FMEA has been to complete it, there was little concern for quality. The emphasis of DRBFM is to discuss. "

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.: "Good Design
The basis for reliability is to not change the design. It is the equivalent of Just-in-Time in the manufacturing process. Disturbances of Just-in-Time in manufacturing are the increases or depletions to the planned inventory.
Mr. Yoshimura believes one can preserve reliability in a proven design by not changing it. If the design is changed, it should be done in small increments. The disturbance to a design is the discontinuity caused by a design change affecting the interfaces between parts. The design should not be changed simultaneously in two places. Making too many changes too fast will result in failures faster than our capacity to detect. The key is to make design changes visible. "

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.

PlanTech: DRBFM-"The Next Big Thing" in Quality Disciplines.: "Tatsuhiko Yoshimura, a quality expert and a professor at Japan's Kyushu University, knew that design problems occur when changes are made without a proper level of supporting communication.
Using the methodologies of Mizenboushi, or Preventative Measures, Yoshimura created his own philosophy of DRBFM�Design Review Based on Failure Modes.
The philosophy of DRBFM centers around three concepts called GD3:
Good Design
Good Discussion
Good Dissection
The following is a high level breakdown of the practices of GD3�the cornerstone principles of DRBFM. "

: "Simultaneous Engineering (Dr. Harald L�tteke, Continental Teves AG & Co. oHG; Peter Rosenbeck, APIS IT GmbH):
The usefulness of shared workflow was demonstrated on the basis of a major project that went over more than 6 months and generated thousands of changes. This new feature of consolidating shared information will be another additional component of APIS IQ-Software Version 5.1."

Design Review Based on Failure Mode (DRBFM)

Design Review Based on Failure Modes (DRBFM) is a tool developed by the Toyota Motor Corporation based on the philosophy that design problems occur when changes are made to engineering designs.
The idea is to make changes from a previous, proven design highly visible and explore concerns, causes and impacts of that change. The points of change, according to the DRBFM theory, are the source of future failures.
PlanTech offers training and facilitation for DRBFM that will enable you to adopt this analytical method, and integrate in seamlessly into your present operations.