DELIVERING QUALITY SINCE 1952.

User Interface FunctionalTest Schemes

04.22.15

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Introduction

This webinar will explain the different test methods used with our Custom User-Machine Interface (HMI) products

We will identify the types of tests performed and when these tests will be selected

During this presentation we will discussthe below test methods:

– First Article Testing (FAT)– Functional / Acceptance Testing (AT)– Environmental Stress Screening (ESS)– Qualification Testing (QT)

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First Article Tests (FAT)

First Article Tests (FAT) are formal one time tests performed to identify the effectiveness of the manufacturing process, equipment and procedures

FAT Tests are widely used by the Military, Aerospace, Automotive and Medical industries

FAT Tests are performed on Epec User-Machine Interfaces, Cable Assemblies and Box builds manufactured at our Largo, FL location

FAT testing is selected and determined based on the customer requirements and can be provided per request

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First Article Test Benefits

Verify the accuracy of drawings and ensure that they reflect any changes made to parts design during the prototype design

Verify the production process in every parameter, rather than just concentrating on “critical” dimensions

Verify all tooling used to produce a part, to ensure that it is capable of producing parts to specifications

Verify the ability of the manufacturer to meet the needs of production

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Functional Testing (FT)

Functional Testing (FT) is a quality assurance process that verifies the functionally of the product against a specification

FT tests the functions of the product to include components and the interface

FT Tests are widely used by the Military, Aerospace, Automotive and Medical industries

FT Tests are performed on 100% of all Epec Human-Machine Interfaces, Cable Assemblies and Box builds manufactured at our Largo, FL location

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Functional Testing Benefits

Reduces manufacturing and customer risk

Verify hardware and software functional performance

Verify product stability

Verify electrical test

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FT Case Study

All products designed & manufactured at Epec’s Largo, FL location are FT tested

Each initial production build produces a single FT unit for build and testing

FT allows Epec to identify process and test deficiencies prior to the production build

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Acceptance Testing (AT)

Acceptance Testing (AT) is used to validate that requirements of a product specification are met

AT Tests are widely used by the Military, Aerospace, Automotive and Medical industries

AT Tests are performed on 100% of all Epec Human-Machine Interfaces, Cable Assemblies and Box builds manufactured at our Largo, FL location

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AT Benefits

Validates hardware and software functional performance per customer specification

Validates product manufacturing process

Validation is monitored, measured and recorded

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AT Case Study

Tactile response (feel):– Membrane switch button is measured by analyzing the amplitude, rise slope, and

overall shape of the force displacement curve

Dimensional: – An optical comparator and micrometers are used to confirm dimensional

specifications

Color Testing: – Spectra colorimetry is used to measure and control color

Ink adhesion: – Ink adhesion and durability are measured by cross hatch tape pull and

hardness/abrasion testing

Adhesive:– Performance is assessed using a dynamic peel and static shear test

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AT Case Study – cont.

Electrical:

– Open/short tests are performed on circuits

– Functional tests performed on active circuits to include LEDs, LCD displays, touchscreen, etc.

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Environmental Stress Screening (ESS)

Environmental Stress Screening (ESS) is a process of exposing a newly manufactured or repaired product to stresses such as thermal cycling and vibration in order to force latent defects to expose themselves by permanent or catastrophic failure

The surviving population, upon completion of screening, can be assumed to have a higher reliability than the similar unscreened population

ESS testing is widely used by the Military and Aerospace industries

ESS testing is selected and determined based on the customer requirements and can be provided per request

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ESS Benefits

Improves Quality and Reliability of the product

Fewer product field failures and returns

Produces a more robust design

Provides higher mean time between failure (MTBF)

Yields a High return on investment

Forces product maturity

Improves customer satisfaction and relations

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ESS Case Study

Epec has in house ESS capability

Testing can be designed to be powered and monitored

Current Military HMI program running a 3 day, 10 cycle ESS program from -40ºC to +85ºC

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Qualification Testing (QT)

Qualification Test (QT) simulates defined operational environmental conditions with a predetermined safety factor, the results indicating whether a given design can perform its function within the simulated operational environment of a system

QT testing is a formal contractual test

QT Tests are widely used by the Military, Aerospace, Automotive and Medical industries

QT testing is selected and determined based on the customer requirements and can be provided per request

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QT Benefits

Validates product design integrity over the specified operation and environmental range

Validates the effectiveness of the design, manufacturing process, equipment and procedures

Provides an independent evaluation of customer specification

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QT Case Study

Epec provides qualification testing on a contractual basis

Supporting documentation package

Epec can provide the following QT Testing:– Norman Abrasion Wear– Life Cycle– Tactile Response– Force & Distance– Peel / Ink Adhesion– Environmental– Color– Electrical Parameters

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Summary

Epec can support you with your Custom User to Machine Interface test requirements

Epec can support your project from Concept – Production

Epec can assist with all of the testing discussed in this presentation, to include the following:

• First Article Testing (FAT)• Functional / Acceptance Testing (AT)• Environmental Stress Screening (ESS)• Qualification Testing (QT)

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Our Products

Battery Packs Flex & Rigid-Flex PCB’s User Interfaces

Fans & Motors Cable Assemblies Printed Circuit Boards

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Design Centers & Technical Support

Battery Pack & Power Management – Denver, CO User Interfaces – Largo, FL Fans & Motors – Wales, UK PCB’s – New Bedford, MA & Shenzhen, China Flex & Rigid Flex – Toronto, Canada Cable Assemblies – New Bedford, MA

Our Engineering and Design teams are ready to help our customers create world class and cost effective product solutions.

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Q&A

Questions?– Enter any questions you may have

in the Control Panel

– If we don’t have time to get to it, wewill reply via email

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Thank YouCheck out our previous webinars at www.epectec.com.

For more information email sales@epectec.com.

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