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Quality during Design

Quality during Design is the place for product designers to use quality thinking throughout the design process to create products others love, for less.

by Dianna Deeney Leave a Comment

QDD 057 Design Input & Specs vs. Test & Measure Capability

QDD 057 Design Input & Specs vs. Test & Measure Capability

Design Input & Specs vs. Test & Measure Capability

When defining design inputs and specifications, what does a design engineer need to consider about the test and measure capability? What are the typical ways that we assess the variability that a test or measurement introduces into our result?

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QDD 056 ALT vs. HALT

QDD 056 ALT vs. HALT

ALT vs. HALT

Reliability engineers may suggest environmental stress tests. There are many types of tests in an RE’s toolbox. We compare two types of commonly known tests that are used for design: ALT vs. HALT. What are the important distinctions between these two methods? What value do they each bring to design engineering? And how do they fit into other reliability test methods?

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QDD 055 Quality as a Strategic Asset vs. Quality as a Control

QDD 055 Quality as a Strategic Asset vs. Quality as a Control

Quality as a Strategic Asset vs. Quality as a Control

Viewing Quality as a strategic asset to new product development can help us create those products that others love, for less. We talk about some challenges with new product development, the ideal state, and how we can use quality to get there. Use quality engineering and reliability engineering to P.R.U.N.E. the development process so we can develop the best products that we can.

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QDD 054 Design Specs vs. Process Control, Capability, and SPC

QDD 054 Design Specs vs. Process Control, Capability, and SPC

Design Specs vs. Process Control, Capability, and SPC

This fourth episode of the “QDD Versus” series focuses on concepts relating to Design for Manufacturability. Understand how design specs fit into process control, process capability, and SPC and where they typically don’t fit at all.

We talk about things to think about when setting limits on design features.
And, when defining controls for potential failures, knowing how processes are controlled can help us decide if the controls we have are good enough or not.

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QDD 053 Internal Customers vs. External Customers

QDD 053 Internal Customers vs. External Customers

Internal Customers vs. External Customers

We talk about customers of design information. It takes many people to realize a product design into something that can be sold and used. Those people need design information to ensure that they’re performing their tasks to produce a high-quality product, and to be able to use our product appropriately. We review who our customers are and what type of information they need from design engineers.

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QDD 052 Discrete Data vs. Continuous Data

QDD 052 Discrete Data vs. Continuous Data

Discrete Data vs. Continuous Data

Once we’ve decided to control something (think of our prevention and detection controls), we then need to decide how to measure it. Different controls may need different measuring requirements, which can give us discrete or continuous data.

We treat these data types differently when collecting it, determining sample sizes, and analyzing it for results. Tune-in to learn more about how to take the next step in defining controls: figuring out how to measure it and considering the data.

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QDD 051 Prevention Controls vs. Detection Controls

QDD 051 Prevention Controls vs. Detection Controls

Prevention Controls vs. Detection Controls

Analyzing our design concept for controls can be a great way to stay customer-focused and create products that are easy to use.

There are two basic buckets that we want to think of in terms of controls: prevention controls and detection controls. What are their differences and why do we differentiate between them? We explore this and take a look at risk, too.

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QDD 050 Try this Method to Help with Complex Decisions (DMRCS)

QDD 050 Try this Method to Help with Complex Decisions (DMRCS)

Try this Method to Help with Complex Decisions (DMRCS)

Your team is faced with a complex decision. Maybe it’s complex because you have a lot of options or maybe it’s complex because it’s technically challenging and requires some testing. You may want to consider a structured approach: DMRCS.

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QDD 049 Overlapping Ideas: Quality, Reliability, and Safety

QDD 049 Overlapping Ideas: Quality, Reliability, and Safety

Overlapping Ideas: Quality, Reliability, and Safety

We’ve identified safety concerns about our product design. How concerned do we need to be about quality while we’re determining root causes? There is an intersection of quality, reliability, and safety. Let’s talk about how they fit together.

 

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Filed Under: Quality during Design, The Reliability FM network

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QDD 048 Using SIPOC to Get Started

QDD 048 Using SIPOC to Get Started

Using SIPOC to Get Started

SIPOC diagrams can be used at the beginning of improvement projects, to help teams gauge the scope of a change or to help the team get on the same page. These diagrams can also help a team understand a complex system with many people involved or lots of information exchanges.

SIPOC is short for Suppliers-Inputs-Process-Outputs-Customers.

In creating one with our team, we usually don’t fill it out left to right. We talk about how to build one in this episode.

We also step through an example. Look below for the results.

 

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QDD 047 Risk Barriers as Swiss Cheese?

QDD 047 Risk Barriers as Swiss Cheese?

Risk Barriers as Swiss Cheese?

There’s a model that can help us visualize and consider the different barriers to harm: The Swiss Cheese Model of Accident Causation.

Learn what makes up this model and how ideas are represented. There are also different ways that the model is being used today.

How can we design for controls, policies, or actions that are part of the use of our product but outside of our control? We step through an example of a situation where we’re thinking about our product design in this way.

 

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Filed Under: Quality during Design, The Reliability FM network

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QDD 046 Environmental Stress Testing for Robust Designs

QDD 046 Environmental Stress Testing for Robust Designs

Environmental Stress Testing for Robust Designs

There is a rather large family of test methods associated with Qualitative Accelerated Tests. They’re also known as RETs (or Reliability Enhancement Tests).

Today, we’re focused on the models that are used to help us with the design. Awareness about these methods will help us with future test plans and project management. We talk about environmental stress testing and remind ourselves a little about HALT.

 

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Filed Under: Quality during Design, The Reliability FM network

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QDD 045 Choosing a Confidence Level for Test using FMEA

QDD 045 Choosing a Confidence Level for Test using FMEA

Choosing a Confidence Level for Test using FMEA

We’re developing requirements for our product, including setting reliability requirements. Or we’re setting acceptance criteria for our test plans.

What confidence levels do we choose? We don’t have to blindly set them – we can base it off the risks of failure, using our FMEA (failure mode effects analysis).

 

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QDD 044 Getting Started with FMEA – It All Begins with a Plan

QDD 044 Getting Started with FMEA – It All Begins with a Plan

Getting Started with FMEA – It All Begins with a Plan

We’re starting to populate an FMEA table with our team. We get it started, but then we get stuck in disagreements. Or we think we finish it and then we don’t know what to do with it.

We can avoid these headaches with a little planning (or maybe a lot of planning – it depends on the project). We talk about risk management planning as it relates to FMEA.

 

 

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Filed Under: Quality during Design, The Reliability FM network

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QDD 043 How can 8D help Solve my Recurring Problem?

QDD 043 How can 8D help Solve my Recurring Problem?

How can 8D help Solve my Recurring Problem?

We talk about the 8D methodology, describe situations where we could benefit from it, list each of the 8 Disciplines, and compare it to PDSA and DMAIC.

 

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Filed Under: Quality during Design, The Reliability FM network

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Tips for using quality tools and methods to help you design products others love, for less.


by Dianna Deeney
Quality during Design,
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Recent Episodes

QDD 057 Design Input & Specs vs. Test & Measure Capability

QDD 056 ALT vs. HALT

QDD 055 Quality as a Strategic Asset vs. Quality as a Control

QDD 054 Design Specs vs. Process Control, Capability, and SPC

QDD 053 Internal Customers vs. External Customers

QDD 052 Discrete Data vs. Continuous Data

QDD 051 Prevention Controls vs. Detection Controls

QDD 050 Try this Method to Help with Complex Decisions (DMRCS)

QDD 049 Overlapping Ideas: Quality, Reliability, and Safety

QDD 048 Using SIPOC to Get Started

QDD 047 Risk Barriers as Swiss Cheese?

QDD 046 Environmental Stress Testing for Robust Designs

QDD 045 Choosing a Confidence Level for Test using FMEA

QDD 044 Getting Started with FMEA – It All Begins with a Plan

QDD 043 How can 8D help Solve my Recurring Problem?

QDD 042 Mistake-Proofing – The Poka-Yoke of Usability

QDD 041 Getting Comfortable with using Reliability Results

QDD 040 How to Self-Advocate for More Customer Face Time (and why it’s important)

QDD 039 Choosing Quality Tools (Mind Map vs. Flowchart vs. Spaghetti Diagram)

QDD 038 The DFE Part of DFX (Design For Environment and eXcellence)

QDD 037 Results-Driven Decisions, Faster: Accelerated Stress Testing as a Reliability Life Test

QDD 036 When to use DOE (Design of Experiments)?

QDD 035 Design for User Tasks using an Urgent/Important Matrix

QDD 034 Statistical vs. Practical Significance

QDD 033 How Many Do We Need To Test?

QDD 032 Life Cycle Costing for Product Design Choices

QDD 031 5 Aspects of Good Reliability Goals and Requirements

QDD 030 Using Failure Rate Functions to Drive Early Design Decisions

QDD 029 Types of Design Analyses possible with User Process Flowcharts

QDD 028 Design Tolerances Based on Economics (Using the Taguchi Loss Function)

QDD 027 How Many Controls do we Need to Reduce Risk?

QDD 026 Solving Symptoms Instead of Causes?

QDD 025 Do you have SMART ACORN objectives?

QDD 024 Why Look to Standards

QDD 023 Getting the Voice of the Customer

QDD 022 The Way We Test Matters

QDD 021 Designing Specs for QA

QDD 020 Every Failure is a Gift

QDD 019 Understanding the Purposes behind Kaizen

QDD 018 Fishbone Diagram: A Supertool to Understand Problems, Potential Solutions, and Goals

QDD 017 What is ‘Production Equivalent’ and Why Does it Matter?

QDD 016 About Visual Quality Standards

QDD 015 Using the Pareto Principle and Avoiding Common Pitfalls

QDD 014 The Who’s Who of your Quality Team

QDD 013 When it’s Not Normal: How to Choose from a Library of Distributions

QDD 012 What are TQM, QFD, Six Sigma, and Lean?

QDD 011 The Designer’s Important Influence on Monitoring After Launch

QDD 010 How to Handle Competing Failure Modes

QDD 009 About Using Slide Decks for Technical Design Reviews

QDD 008 Remaking Risk-Based Decisions: Allowing Ourselves to Change our Minds.

QDD 007 Need to innovate? Stop brainstorming and try a systematic approach.

QDD 006 HALT! Watch out for that weakest link

QDD 005 The Designer’s Risk Analysis affects Business, Projects, and Suppliers

QDD 004 A big failure and too many causes? Try this analysis.

QDD 003 Why Your Design Inputs Need to Include Quality & Reliability

QDD 002 My product works. Why don’t they want it?

QDD 001 How to Choose the Right Improvement Model

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