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Software Quality Assurance

Quality Software Development - User Centric and Cost Effective

From Inception to Completion, Stage by Stage with Right Strategy and Right Architecture

We, at Leonsoft, believe that the role of testers is not just to validate whether the software conform to the user requirements but to ensure that the software developed is well designed, best in quality, user centric and cost effective. Therefore, they are involved from the very start to the end of the project that is from requirements gathering, implementation to deployment. Our experienced testers are a curious lot who do not stop at anything until they get answers to their questions. They also check out all possible and unthinkable scenarios to produce clean and healthy software.We consider test cases and test scenarios to be the very backbone of software testing as it helps to discover more bugs. However, it doesn't mean that the number of test cases is directly proportional to the number of bugs discovered. An ideal test case or test scenario can do the trick what tons of imperfect test cases or scenarios can't achieve.At Leonsoft, test automation is an integral part of our software testing process . We maintain high quality standards while carrying out automated testing so that when new functionalities are added it doesn't break the existing features that were known to work perfectly.Our quality experts completely understand the business requirements by working in tandem with other teams so that the software developed matches the client's requirements perfectly.


Software quality assurance

Software quality assurance (SQA) consists of a means of monitoring the software engineering processes and methods used to ensure quality.[citation needed] The methods by which this is accomplished are many and varied, and may include ensuring conformance to one or more standards, such as ISO 9000 or a model such as CMMI.

SQA encompasses the entire software development process, which includes processes such as requirements definition, software design, coding, source code control, code reviews, change management, configuration management, testing, release management, and product integration. SQA is organized into goals, commitments, abilities, activities, measurements, and verifications.


Total quality management

Total Quality Management / TQM is an integrative philosophy of management for continuously improving the quality of products and processes. TQM is based on the premise that the quality of products and processes is the responsibility of everyone involved with the creation or consumption of the products or services which are offered by an organization, requiring the involvement of management, workforce, suppliers, and customers, to meet or exceed customer expectations.

we have identified nine common TQM practices:

    • cross-functional product design
    • process management
    • supplier quality management
    • customer involvement
    • information and feedback
    • committed leadership
    • strategic planning
    • cross-functional training
    • employee involvement
  • .

    Eight dimensions of quality :
    Eight dimensions of quality

    Eight dimensions can be used at a strategic level to analyze quality characteristics. The concept was defined by David Garvin. Some of the dimensions are mutually reinforcing, whereas others are not—improvement in one may be at the expense of others. Understanding the trade-offs desired by customers among these dimensions can help build a competitive advantage. Eight dimensions can be summarized as follows:


    1. Performance :
    Performance

    Performance refers to a product's primary operating characteristics. This dimension of quality involves measurable attributes, so brands can usually be ranked objectively on individual aspects of performance. Overall performance rankings,however, are more difficult to develop, especially when they involve benefits that not every consumer needs. Performance is often a source of contention between customers and suppliers, particularly when deliverables are not adequately defined within specifications. The performance of a product often influences the profitability or reputation of the end-user. As such, many contracts or specifications include damages related to inadequate performance. The question of whether performance differences are quality differences may depend on circumstantial preferences-but preferences based on functional requirements, not taste. Some performance standards are based on subjective preferences, but the preferences are so universal that they have the force of an objective standard.


    2. Features :
    Features

    Features are additional characteristics that enhance the appeal of the product or service to the user. Similar thinking can be applied to features, a second dimensions of quality that is often a secondary aspects of performance. Features are the "bells and whistles" of products and services, those characteristics that supplement their basic functioning. Examples include free drinks on a plane, permanent-press cycles on a washing machine, and automatic tuners on a color television set. The line separating primary performance characteristics from secondary features is often difficult to draw.


    3. Reliability :
    Reliability

    Reliability is the likelihood that a product will not fail within a specific time period. This is a key element for users who need the product to work without fail.

    This dimension reflects the probability of a product malfunctioning or failing within a specified time period. Among the most common measures of reliability are the mean time to first failure, the mean time between failures, and the failure rate per unit time. Because these measures require a product to be in use for a specified period, they are more relevant to durable goods than to products and services that are consumed instantly.

    Reliability may be closely related to performance. For instance, a product specification may define parameters for up-time, or acceptable failure rates. Reliability is a major contributor to brand or company image, and is considered a fundamental dimension of quality by most end-users. I.E., recent market research shows that, especially for women, reliability has become an automobile's most desired attribute.


    4. Conformance :
    Conformance

    The outcome of two example processes to show the meaning of the two approaches to conformance

    The dimension of conformance depicts to what extent a product’s design and operating characteristics meet established standards. This dimension owes the most to the traditional approaches to quality pioneered by experts like Juran.

    All products and services involve specifications of some sort. When products are developed, these specifications are set and a target is set, for instance the materials used or the dimension of the product. Not only the target but also the tolerance (the range of permitted deviation from the target) is defined. One problem with this approach is that there is little interest in whether the specifications have been met exactly as long as the tolerance limits are met.

    On the one hand, this can lead to the so-called “tolerance stack-up”. When two or more parts are to be fit together, the size of their tolerances often determine how well they will match. Should one part fall at a lower limit of its specification and a matching part at its upper limit, a tight fit is unlikely. The link is likely to wear more quickly than one made from parts whose dimensions have been centered more exactly.

    In service businesses, measures of conformance normally focus on accuracy and timeliness and include counts of processing errors, unanticipated delays and other frequent mistakes.


    5. Durability :
    Durability

    Durability measures the length of a product’s life. When the product can be repaired, estimating durability is more complicated. The item will be used until it is no longer economical to operate it. This happens when the repair rate and the associated costs increase significantly. Technically, durability can be defined as the amount of use one gets from a product before it deteriorates. After so many hours of use, the filament of a light bulb burns up and the bulb must be replaced. Repair is impossible. Economists call such products "one-hoss shays" (Oliver Wendel Holmes poem).

    In other cases, consumers must weigh the expected cost, in both dollars and personal inconvenience, of future repairs against the investment and operating expenses of a newer, more reliable model. Durability, then, may be defined as the amount of use one gets from a product before it breaks down and replacement is preferable to continued repair.

    This approach to durability has two important implications. First, it suggests that durability and reliability are closely linked. A product that often fails is likely to be scrapped earlier than one that is more reliable; repair costs will be correspondingly higher and the purchase of a competitive brand will look that much more desirable. Second, this approach implies that durability figures should be interpreted with care. An increase in product life may not be the result of technical improvements or the use of longer-lived materials. Rather, the underlying economic environment simply may have changed.


    6. Serviceability :
    Serviceability

    Serviceability involves the consumer's ease of obtaining repair service (example: access to service centers and/or ease of self-service), the responsiveness of service personnel(example: ease of getting an appointment, willingness of repair personnel to listen to the customer), and the reliability of service (example: whether the service is performed right the first time). Competence and ease of repair is the speed with which the product can be put into service when it breaks down, as well as the competence and the behavior of the service personnel.

    Consumers are concerned not only about a product breaking down but also about the time before service is restored, the timeliness with which service appointment are kept, the nature of dealings with service personnel, and the frequency with which service calls or repairs fail to correct outstanding problems. In those cases where problems are not immediately resolved and complaints are filed, a company's complainthandling procedures are also likely to affect customer's ultimate evaluation of product and service quality.

    Important attributes for serviceability dimension are: service warranty, parts warranty, parts availability, number of reasonable distance to dealer service centers, distance to service parts center-dealer, distance to service parts center individual, length of wait for service appointment, schedule of preventive maintenance, employees listen to customers, information regarding repairs, courteous service centers, sepaired correctly first time, service time relative to other dealers, warranty claims handled without argument, average repair cost/year, extended warranty, underestimation of service cost and provision of loan car.


    7. Aesthetics :
    Aesthetics

    The aesthetic properties of a product contribute to a company's or brand's identity. Faults or defects in a product that diminish its aesthetic properties, even those that do not reduce or alter other dimensions of quality, are often cause for rejection. Aeshetics refers to how the product looks,feels,sounds,tastes or smells.It is clearly a matter of personal judgement and a reflection of individual preference.Nevertheless,there appear to be some patterns in consumers' rankings of products on the basis of taste. A recent study of quality in 33 food categories,for example,found that high quality was most often associated with "rich and full flavour,tastes natural,tastes fresh,good aroma,and looks apetizing". The aesthetics dimension differs from subjective criteria pertaining to "performance" in that aeshetic choices are not nearly universal.Not all people prefer "rich and full" flavor or even agree on what that means.Companies therefore have to search for a niche.On this dimension of quality,it is impossible to please everyone.


    8. Perceived Quality :
    Perceived Quality

    Perception is reality. The product or service may possess adequate or even superior dimensions of quality, but still fall victim to negative customer or public perceptions. Consumers do not always have complete information about a product's or service's attributes; indirect measures may be their only basis for comparing brands. A product's durability for example,can seldom be observed directly; it usually must be inferred from various tangible and intangible aspects of the product.In such circumstances,images,advertising and brand names-inferences about quality rather than the reality itself-can be critical.For this reason,both Honda-which makes cars in Marysville,Ohio-and Sony-which builds color televisions in San Diego-have been reluctant to publicize that their products are "made in America". Reputation is the primary stuff of perceived quality.Its power comes from an unstated analogy:that the quality of products today is similar to the quality of products of yesterday,or the quality of goods in a new product line is similar to the quality of a company's established products.





    Quality Service

    Quality means meeting customers' (agreed) requirements, formal and informal, at lowest cost, first time every time.
    -Robert L. Flood (1993)

    Intelligent Quotes

    A solid working knowledge of productivity software and other IT tools has become a basic foundation for success in virtually any career. Beyond that, however, I don't think you can overemphasise the importance of having a good background in maths and science.....
    "Every software system needs to have a simple yet powerful organizational philosophy (think of it as the software equivalent of a sound bite that describes the system's architecture)... A step in thr development process is to articulate this architectural framework, so that we might have a stable foundation upon which to evolve the system's function points. "
    "All architecture is design but not all design is architecture. Architecture represents the significant design decisions that shape a system, where significant is measured by cost of change"
    "The ultimate measurement is effectiveness, not efficiency "
    "It is argued that software architecture is an effective tool to cut development cost and time and to increase the quality of a system. "Architecture-centric methods and agile approaches." Agile Processes in Software Engineering and Extreme Programming.
    "Java is C++ without the guns, knives, and clubs "
    "When done well, software is invisible"
    "Our words are built on the objects of our experience. They have acquired their effectiveness by adapting themselves to the occurrences of our everyday world."
    "I always knew that one day Smalltalk would replace Java. I just didn't know it would be called Ruby. "
    "The best way to predict the future is to invent it."
    "In 30 years Lisp will likely be ahead of C++/Java (but behind something else)"
    "Possibly the only real object-oriented system in working order. (About Internet)"
    "Simple things should be simple, complex things should be possible. "
    "Software engineering is the establishment and use of sound engineering principles in order to obtain economically software that is reliable and works efficiently on real machines."
    "Model Driven Architecture is a style of enterprise application development and integration, based on using automated tools to build system independent models and transform them into efficient implementations. "
    "The Internet was done so well that most people think of it as a natural resource like the Pacific Ocean, rather than something that was man-made. When was the last time a technology with a scale like that was so error-free? The Web, in comparison, is a joke. The Web was done by amateurs. "
    "Software Engineering Economics is an invaluable guide to determining software costs, applying the fundamental concepts of microeconomics to software engineering, and utilizing economic analysis in software engineering decision making. "
    "Ultimately, discovery and invention are both problems of classification, and classification is fundamentally a problem of finding sameness. When we classify, we seek to group things that have a common structure or exhibit a common behavior. "
    "Perhaps the greatest strength of an object-oriented approach to development is that it offers a mechanism that captures a model of the real world. "
    "The entire history of software engineering is that of the rise in levels of abstraction. "
    "The amateur software engineer is always in search of magic, some sensational method or tool whose application promises to render software development trivial. It is the mark of the professional software engineer to know that no such panacea exist "


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    Agile And Scrum Based Architecture

    Agile software development is a group of software development methods based on iterative and incremental development, where requirements and solutions evolve through collaboration.....

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    Total quality management

    Total Quality Management / TQM is an integrative philosophy of management for continuously improving the quality of products and processes. TQM is based on the premise that the quality of products and .....

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