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    Embedded Software Quality Assurance (QA)

    As for every software there needs to be quality assurance testing for embedded software with a special focus on reliability since this is often key in

    POSTED ON

    JUNE 13, 2010 BY JEAN-LUC AUFRANC (CNXSOFT) - NO COMMENTS

    ON EMBEDDED SOFTWARE QUALITY ASSURANCE (QA)

    Embedded Software Quality Assurance (QA)

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    As for every software there needs to be quality assurance testing for embedded software with a special focus on reliability since this is often key in embedded systems.

    Software testing / QA may be a very controversial subject as everybody may have very diverging and strong opinions on how it should be done, and the way it is done also depends on the company culture (and size).

    So here’s the way I personally see the different steps to testing, please let me know if you feel otherwise in comments.

    Unit Testing: This is the lowest type of test (white box testing) where the developer should check the implemented functions work as expectedFunctional Testing: Although the software team should check if the main functionalities of the software work properly before committing the code (assuming you are using a version control system and you should), QA team ought to check all possible scenarios including border case to check the implementation match the software requirements.Interoperability Testing: This obviously depends on the type of product developed and if your device must inter-operate with other equipments for example VoIP phones or ATA devices must be able to communicate with at least the main SIP servers (e.g. asterisk) ) on the market or/and any server that is required by your customers. This team would be performed by the QA test after the function tests passed.Performance Testing: The QA team should perform performance test either based on product requirements or competitors performance to check the performance of the device is appropriate. e.g. hard disk speed, USB mass storage speed, (wired and wireless) network download/upload, etc…Reliability / Burn-In Testing: Once of the above test passed, you ought to perform some burn-in test with different scenarios and possibly worst case scenarios. Depending of the type of product you are using, you may consider 7 days reliability test to be long enough.Developper Testing vs. QA Testing.

    There are also different opinions on who should write the test procedure:

    1. The software engineer should write a draft test procedure for the code he wrote and the QA team should improve it.

    2. The QA team should be responsible for the test procedure.

    I personally prefer solution 2. because the QA team would them be able to pinpoint more easily incorrect implementation by the software team due to incomprehension of the software requirements. This can also help improving unclear software requirements, whereas solution 1. may influence the test team into following the software team judgment.

    I also understand the point of view of other persons that explain that testers are doing black box testing and may not fully understand how the software works.

    The other reasons one might give a larger responsibility to the QA team is that the software engineers generally costs more than software testers, So it ought to reduce the total project cost.

    Here’s an interesting thread about software engineer vs QA team testing.

    Jean-Luc Aufranc (CNXSoft)

    Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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    Testing and Quality Assurance

    Testing and Quality Assurance, The software system needs to be checked for its intended behavior and direction of progress at each development stage to avoid duplication of efforts, time and

    Testing and Quality Assurance

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    The software system needs to be checked for its intended behavior and direction of progress at each development stage to avoid duplication of efforts, time and cost overruns, and to assure completion of the system within stipulated time.The software system needs to be checked for its intended behavior and direction of progress at each development stage to avoid duplication of efforts, time and cost overruns, and to assure completion of the system within stipulated time.

    System testing and quality assurance come to aid for checking the system. It includes −

    Product level quality (Testing)

    Process level quality.

    Let us go through them briefly −

    Testing

    Testing is the process or activity that checks the functionality and correctness of software according to specified user requirements in order to improve the quality and reliability of system. It is an expensive, time consuming, and critical approach in system development which requires proper planning of overall testing process.

    A successful test is one that finds the errors. It executes the program with explicit intention of finding error, i.e., making the program fail. It is a process of evaluating system with an intention of creating a strong system and mainly focuses on the weak areas of the system or software.

    Characteristics of System Testing

    System testing begins at the module level and proceeds towards the integration of the entire software system. Different testing techniques are used at different times while testing the system. It is conducted by the developer for small projects and by independent testing groups for large projects.

    Stages of System Testing

    The following stages are involved in testing −

    Test Strategy

    It is a statement that provides information about the various levels, methods, tools, and techniques used for testing the system. It should satisfy all the needs of an organization.

    Test Plan

    It provides a plan for testing the system and verifies that the system under testing fulfils all the design and functional specifications. The test plan provides the following information −

    Objectives of each test phase

    Approaches and tools used for testing

    Responsibilities and time required for each testing activity

    Availability of tools, facilities, and test libraries

    Procedures and standards required for planning and conducting the tests

    Factors responsible for successful completion of testing process

    Test Case Design

    A number of test cases are identified for each module of the system to be tested.

    Each test case will specify how the implementation of a particular requirement or design decision is to be tested and the criteria for the success of the test.

    The test cases along with the test plan are documented as a part of a system specification document or in a separate document called test specification or test description.

    Test Procedures

    It consists of the steps that should be followed to execute each of the test cases. These procedures are specified in a separate document called test procedure specification. This document also specifies any special requirements and formats for reporting the result of testing.

    Test Result Documentation

    Test result file contains brief information about the total number of test cases executed, the number of errors, and nature of errors. These results are then assessed against criteria in the test specification to determine the overall outcome of the test.

    Types of Testing

    Testing can be of various types and different types of tests are conducted depending on the kind of bugs one seeks to discover −

    Unit Testing

    Also known as Program Testing, it is a type of testing where the analyst tests or focuses on each program or module independently. It is carried out with the intention of executing each statement of the module at least once.

    In unit testing, accuracy of program cannot be assured and it is difficult to conduct testing of various input combination in detail.

    It identifies maximum errors in a program as compared to other testing techniques.

    Integration Testing

    In Integration Testing, the analyst tests multiple module working together. It is used to find discrepancies between the system and its original objective, current specifications, and systems documentation.

    Here the analysts are try to find areas where modules have been designed with different specifications for data length, type, and data element name.

    It verifies that file sizes are adequate and that indices have been built properly.

    स्रोत : www.tutorialspoint.com

    (PDF) Quality Assurance for Component

    PDF | On Dec 1, 2018, Wenbin Li and others published Quality Assurance for Component-based Systems in Embedded Environments | Find, read and cite all the research you need on ResearchGate

    Conference PaperPDF Available

    Quality Assurance for Component-based Systems in Embedded Environments

    December 2018

    DOI:10.1109/IINTEC.2018.8695299

    Conference: 2018 International Conference on Internet of Things, Embedded Systems and Communications (IINTEC)

    Authors: Wenbin Li

    Technology Innovation Institute (TII)

    Franck Le Gall EGM Panagiotis Vlacheas Alexey Cheptsov

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    PHANTOM Architecture

    QA Activities driven by MBT

    Functional and non-functional testing workflow

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    स्रोत : www.researchgate.net

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