Published on March 20, 2014
www.xbosoft.com Webinar March 20 2014 11.00 AM EST You are at the right place, it’s almost time….10 minute countdown
WELCOME XBOSOFT Software Quality Knowledge Center is proud to partner with and introduce Shilpa Dadhwal CEO and Founder SQE Labs, Inc.
On the call Shilpa Dadhwal, Philip Lew and Jan Princen Moderator: Carolyn Choh Shilpa Dadhwal, Founder and CEO, SQE Labs Inc Philip Lew CEO, XBOSoft Jan Princen Managing Director, XBOSoft
Agenda • Introduction XBOsoft • Software Quality – Quick recap of Day 1 and 2 • Software quality models • Advantages and impact of using them • Moving on to Day 3 – Barriers and issues to business of software quality – Implications for Senior Management for setting guidelines – Implications for Project Management for best practices • Q and A • Today’s meeting March 20th https://www3.gotomeeting.com/register/886356774
• Specialize in: Software Quality Improvement • Quality Process Improvement & Testing • American Company • Located in: San Francisco, Amsterdam & Beijing • Over 100 Software Quality Experts XBOSoft Introduction
“Proven Results” “Our products are very complex. We expected a one year ramp up time, but XBO was able to contribute to our release cycles in just 6 months. ." - Development Vice President, Hyperion- Oracle “ "The results are very encouraging. Thanks a lot for all the effort put into this project. We really appreciate your work." - Manager, Quality Assurance, Autodesk "Everything you've done is impressive and we are quite pleased with the quality of the test cases, well done! So keep up the good work." - QA Director, CA
Welcome to the Session 3 on ‘Measuring Software Quality – Its Economic Value’ Shilpa Dadhwal Founder & Director SQE Labs Inc. Skype ID : shilpa2d Email ID : firstname.lastname@example.org Presentated By:
SQE Labs offers an independent Software Testing and Quality Assurance services and is committed to improving quality by providing superior QA solutions to customers About USA Specialist Independent Software Testing Solutions Provider Team of Software Quality Engineering professionals having strong Techno-functional knowledge Provides services in the areas of Outsourced Software Testing, Software Testing Consultancy and Software Testing Trainings Having Offices in Texas (US) and Chandigarh (India)
What is Software Quality? What is its Economic Value? How to mange Software Quality? What are its Attributes? Why do we need to measure it? How do we measure it? Issues while measuring it? Guidelines for measuring it? A Specialist Independent Software Testing Solution Provider Questions in Mind Session 1 Session 2 Session 3
1. QUALITY MODELS for defining Software Quality Attributes 2. ADVANTAGES of measuring Software Quality 3. IMPACT of ‘Software Quality’ on Business 4. BARRIERS to achieve ‘High’ Software Quality 5. ISSUES in measuring Software Quality 6. GUIDELINES for measuring Software Quality 7. PRACTICES to be followed A Specialist Independent Software Testing Solution Provider Agenda
“Quality is never an accident; it is always the result of intelligent effort.” – John Ruskin RemarkA Specialist Independent Software Testing Solutions Provider
QuestionsA Specialist Independent Software Testing Solutions Provider Do you know the most critical Software Quality Attribute for your product/service? Do you know how to measure the identified Software Quality Attribute? Are you able to make right decisions, after measuring the critical Software Quality Attribute? If any of the above answer is ‘No’, then …….
A quality model is a specification of the required characteristics that a software system must exhibit A quality model that defines quality attributes precisely improves communications between acquirers, architects, and developers. A quality model that specifies usable and practical metrics can improve the quality of design models. Effective application of a quality model adds more quality control earlier in the project’s life cycle Validate the completeness of a requirements definition Identifies user acceptance criteria for a completed software product Identifies software requirements Identifies software design objectives Identifies software testing objectives Quality ModelsA Specialist Independent Software Testing Solutions Provider
Several quality models have been developed over the years. McCall/GE Quality Model • Organizes quality around three uses of software: product revision, product operations, and product transition Boehm Quality Model • Shares a common subset with the McCall model and identifies additional quality attributes ISO/IEC 9126-1:2001 Quality Standard • Identifies six quality characteristics – functionality, reliability, usability, efficiency, maintainability, and portability. These are further divided into several sub-characteristics Quality ModelsA Specialist Independent Software Testing Solutions Provider
McCall’s Traingle for Quality An Independent Software Testing Solution Provider PRODUCT REVISIONPRODUCT REVISION PRODUCT TRANSITIONPRODUCT TRANSITION PRODUCT OPERATIONPRODUCT OPERATION • Maintainability • Flexibility • Testability • Portability • Reusability • Interoperability • Correctness • Usability • Reliability • Efficiency • Integrity Ability to change Adaptability to new environments Basic operational characteristic Factors (characteristics) describe the external view of the software as viewed by users of the application
McCall’s Traingle for Quality The model details three types of quality characteristics (major perspectives) in a hierarchy of factors, criteria and metrics: 11 Factors (To specify): They describe the external view of the software, as viewed by the users. 23 quality criteria (To build): They describe the internal view of the software, as seen by the developer. Metrics (To control): They are defined and used to provide a scale and method for measurement A Specialist Independent Software Testing Solutions Provider
Factors (characteristics) describe the external view of the software as viewed by users of the application Boehm Quality Model A Specialist Independent Software Testing Solutions Provider
The high-level characteristics represent basic high-level requirements of actual use to which evaluation of software quality could be put – the general utility of software The intermediate level characteristic represents Boehm’s 7 quality factors that together represent the qualities expected from a software system The primitive characteristics provide the foundation for defining qualities metrics Boehm Quality Model A Specialist Independent Software Testing Solutions Provider
ISO 9126 identifies the internal characteristics and external quality characteristics of a software product and contains various characters. ISO/IEC 9126-1:2001 Quality Standard A Specialist Independent Software Testing Solutions Provider
Advantages of Measuring Software Quality High levels of defect removal efficiency Happier customers Better team morale Shorter development schedules Lower development costs Lower maintenance costs and Total cost of ownership (TCO) that will be less than 50% of the same kinds of projects that botch up quality. A Specialist Independent Software Testing Solutions Provider
Issues in Measuring Software Quality Cost of Collecting Metrics • Automation is less costly than manual method • CASE tool may not be free • Development cost of the tool • Extra execution time for collecting metrics • Interpretation of metrics consumes resources Validity of the metrics • Does the metric really measure what it should? • What exactly should be measured? Selection of metrics for measurement • Hundreds are available and with the same cost A Specialist Independent Software Testing Solutions Provider
Impact of ‘Software Quality’ on Business Software Quality Income Expense 'High' Software Quality • More Customers • Repeat Business • Competitive Advantage • Lower Production Cost through reduced inventory • Lower Inspection Cost • Lower Working Capital 'Low' Software Quality • Loss of Business • Penalties for late delivery or service • Partial or late payments due to customer dissatisfaction • Scrap and rework cost • Warranty Cost • Sorting Cosy • Express shipping cost Profit = Income - Expense A Specialist Independent Software Testing Solutions Provider
Barriers in Achieving ‘High’ Software Quality Specifying Quality Requirements • There has been little work in the field of formal specification for non- functional requirements Modeling Methods Don’t Address Quality Attributes • Design methodologies are weak in representing nonfunctional requirements Designing for Quality Attributes • Quality attributes are interdependent and cannot be achieved in isolation Solution Catalogues and Quality Attributes • Design patterns can be used to address some quality attributes, but mapping them to a design pattern’s context and problem statements is not easy. • It may be worthwhile to begin cataloguing patterns with respect to standardized quality attributes Quality Control is an Afterthought • Putting testing off until the end of the project is effectively a statement that quality is not important enough to be assessed early A Specialist Independent Software Testing Solutions Provider
Guidelines Use common sense and organizational sensitivity when interpreting metrics data Provide regular feedback to the individuals and teams who have worked to collect measures and metrics. Don’t use metrics to appraise individuals Work with practitioners and teams to set clear goals and metrics that will be used to achieve them Never use metrics to threaten individuals or teams Metrics data that indicate a problem area should not be considered “negative.” These data are merely an indicator for process improvement Don’t obsess on a single metric to the exclusion of other important metrics A Specialist Independent Software Testing Solutions Provider
Practices to improve Software Quality A Specialist Independent Software Testing Solutions Provider Sl. No Practice Impact on Quality Benefit Relevant Roles 1 Define Quality Attribute to match your needs • Meet business Requirements • Achieve a satisfying user experience Development team is chartered with a definition of quality that fits the given time, resource and budget constraints • Business Stakeholders • Development Team 2. Broadcast simple quality metrics Reduce defects Highly visible quality metrics keeps quality on the top of the mind for the entire team and exposes when the effort falls short Development Team 3. Fine tune team and individual goals to include quality • Meet business Requirements Achieve a satisfying user experience Reduce defects Team members perform according to their incentives; thus making quality improvement part of their goals reinforces desirable behaviour Management
Practices to improve Software Quality A Specialist Independent Software Testing Solutions Provider Sl. No Practice Impact on Quality Benefit Relevant Roles 4. Get requirements right • Meet business Requirement • Achieve a satisfying user experience Less rework means less retesting and fewer cycles, which greatly reduces overall effort • Managers • Business Analysts • User Experience designers • Architects 5. Test smarter to test less Reduce defects • Focussing testing on the most important and most riskiest areas ensures that the bugs that slip through are likely to be confined to the least important features • Use Testing tools • Quality Assurance • Managers 6. Design applications to lessen bug risks Reduce defects Simple, cleaner designs results in code that is simpler, cleaner and easier to test and rework- which means that the code will have fewer bugs and those bugs found will be easier to diagnose and repair • Architects • Developers
Step 1: IDENTIFY the key ‘Software Quality’ attribute(s) for your product/service Step 2: Identify the METRIC which can be used to measure the identified ‘Software Quality’ attribute(s) Step 3: Devise PLAN to measure the Metric for each key ‘Software Quality’ attribute Step 4: IMPLEMENT the plan to measure the metric during the course of the software development lifecycle Step 5: MONITOR the Metric and publish the results to all the affected stakeholders Step 6: If the results are not within acceptable limits, devise an action plan to further IMPROVE it and go back to Step 4 till the Software Quality Attribute measured is acceptable Next Step…A Specialist Independent Software Testing Solutions Provider
What is Software Quality? What is its Economic Value? How to mange Software Quality? What are its Attributes? Why do we need to measure it? How do we measure it? Issues while measuring it? Guidelines for measuring it? A Specialist Independent Software Testing Solution Provider Questions Answered Session 1 Session 2 Session 3
A Specialist Independent Software Testing Solution Provider Remember… Commitment to QUALITY always pays off
Thank YouA Specialist Independent Software Testing Solutions Provider India Office SQE Labs Inc. 116/8, Mohali (Chandigarh) India – 160062 www.sqelabs.com US Office SQE Labs LLC, 6533, Preston Rd, Plano, TX - 75024 Contact me : email@example.com
Follow: @XBOSoft Questions: firstname.lastname@example.org 408-350-0508
Thank You! See you tomorrow Tomorrow’s meeting March 20th https://www3.gotomeeting.com/register/886356774 Shilpa Dadhwal, Founder and CEO, SQE Labs Inc Philip Lew CEO, XBOSoft Jan Princen Managing Director, XBOSoft
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