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Topic: Testability

In the News (Fri 18 Apr 14)

  Testing Testability
Testability is a non-functional requirement important to the testing team members and the users who are involved in user acceptance testing.
Testability can be addressed at this phase by using specific queries (for certain applications), generation of stubs and drivers for integration testing, and using test harnesses for specific modules or components.
Testability is perceived to be expensive because the cost of adding testability in the different phases is very easy to identify, but the losses incurred due to its absence are not very easy to determine.
www.stickyminds.com /se/S8077.asp   (1156 words)

 [No title]
Testability: A design characteristic which allows the status (operable, inoperable, or degraded) of an item to be determined and the isolation of faults within the item to be performed in a timely manner.
Testability has been broadly accepted as the “-ility” that deals with those aspects of a system that allows the status (operable, inoperable, or degraded) or health state to be determined.
Testability analysis is performed on the models of the design in a top down manner in order to verify that the functional/physical partitioning and diagnostic requirements allocation will realistically satisfy the top level requirements, using the same metrics as identified above.
grouper.ieee.org /groups/1232/1522/P1522-Feb01.doc   (7745 words)

 Testability Analysis
The testability analysis metrics produced by the Diagnostic Profiler are based on the definition of tests to be applied to the design.
Testability analysis parameters are usually only meaningful in the context of a defined test or diagnostic strategy, which involves an engineering trade-off and analysis process.
The time to calculate testability is related to the size of the design, and the number of tests specified.
www.giordano.com /Help/Sect6.htm   (3942 words)

 Design For Testability
Testability can best be described as the ease with which the functionality of any electronic product circuit or component can be determined to a desired degree of accuracy.
Testability is critical to the manufacturing process -- a product that cannot be readily tested is not really manufacturable.
Testability, on the other hand, is introduced at the design stage, where it dramatically lowers the cost of test and the time spent at test.
www.testelectronics.com /dft.htm   (2470 words)

 Component Testability and Component Testing Challenges
An ideal testable software component is not only deployable and executable, but also testable with the support of standardized components test facilities.
Testable components must have a set of built-in interfaces to interact with a set of well-defined testing facilities.
Although testable components have their distinct functional features, data and interfaces, they must have a well-defined test architecture model and built-in test interfaces to support their interactions to component test suites and a component test-bed.
www.sei.cmu.edu /pacc/cbse2000/papers/18/18.html   (2280 words)

 Improving Software Testability   (Site not responding. Last check: 2007-10-15)
This article focuses on how to improve the testability of software that needs to be of a high quality, but also needs to be cost-effective to produce -- in other words, consumer or corporate software.
ST Labs, in its training courses, has defined software testability simply as "a judgement of how effectively the software can be tested." This is a very broad definition; it looks at all aspects of a program that might make it more difficult to test.
The more testable your software is, the better chance you have of releasing a high quality product on time.
www.veritest.com /tn/html/tn/testability.asp   (2307 words)

 Design for Testability - Laboratory work 4
The testability is one of the most important requirements which should be considered along with other essential constraints such as performance or cost when designing a circuit.
The simplest way to add a testability to a device is to insert additional pins connected to some control points inside the device in order to control and/or to observe the internal processes.
The testability can be measured by the fault coverage (or by the number of untestable faults) as well as by the test length or by the test generation time.
www.pld.ttu.ee /diagnostika/labs/dftlab.htm   (634 words)

 [No title]
As defined in MIL-STD-2165, testability is “a design characteristic which allows the status (operable, inoperable, or degraded) of an item to be determined and the isolation of faults within the item to be performed in a timely manner.” REF _Ref448906818 \r \h [1].
Background Testability has been broadly recognized as the “-ility” that deals with those aspects of a system that allow the status (operable, inoperable, or degraded) or health state to be determined.
Lacking well-defined testability measures, the tasks of establishing testability requirements, and predicting and evaluating the testability of the design are extremely difficult.
grouper.ieee.org /groups/1232/pubs/ATC-1522-99.doc   (4097 words)

 #0140: Modularity Is For Understandability, Maintainability And Testability   (Site not responding. Last check: 2007-10-15)
Testability provides assurance that the functional testing is more likely to be complete and comprehensive.
Programs with an extremely poor internal structure are likely to be difficult to document; and the effort of restructuring is likely to be less difficult than the effort to come up with a simple, comprehensible explanation of the program's implementation.
Relaxation of the requirements for understandability, maintainability, and testability might be appropriate for programs that are not directly involved with the satisfaction of criteria (e.g., utilities used by administrators that do not directly perform criteria-relevant functions).
www.radium.ncsc.mil /tpep/library/interps/0140.html   (648 words)

 Design for Test and Software Testability   (Site not responding. Last check: 2007-10-15)
Testability is the ease of verifying that a software product satisfies its specifications and requirements.
The technologies of design for test draw attention to building testability into software during design and coding, so that the succeeding processes in test generation and implementation can be greatly simplified.
The most interesting advantage obtained by TOOP is that the built-in testability mechanisms can be inherited and reused in the same way as that of code in software development.
www.ucalgary.ca /~ageras/wshop/abstracts/2003/design-for-testability.htm   (262 words)

 Design for testability   (Site not responding. Last check: 2007-10-15)
Another direction, in contrast with current approaches which seek to add testability features at the structural level after the design is essentially complete, makes the modifications early in the design process.
The approach is to evaluate the testability of a design by analyzing the behavioral or register-transfer level description which is typically used in simulation models for design validation.
In addition to addressing this important problem early in the design phase and decreasing the development cycle, we have found that the testability features often lead to much less overhead and performance impact because the optimizations during the synthesis process include these features.
www.cerc.utexas.edu /~jaa/testing/bmft.html   (398 words)

 Testability Inc.
Testability, Inc. is an IT consulting firm located in Tallahassee, FL specializing in Software Quality Assurance and Testing for small, medium and large software development projects.
As a member company of the Quality Assurance Institute, Testability is committed to not only facilitating knowledge of Quality Assurance and Testing within the IT industry, but also in implementing for their customers ‘best practices’ methodologies to help produce quality software.
Testability services focus on those ‘critical’ areas of the software lifecycle that if left unchecked, lead to defective software, major cost overruns or complete system failure and data loss.
www.testabilityinc.com   (223 words)

 White-papers | Articles | Technical papers | Design for testability to achieve high test coverage   (Site not responding. Last check: 2007-10-15)
Testability requirements are present in various levels of an SoC.
The internal gates of the chip should be made testable for stuck-at faults.
This paper discusses various design / implementation issues typically need to be consid-ered for designing a circuitry for testability, achieving high test coverage in less test time.
www.wipro.com /insights/testcoverage.htm   (182 words)

For core testability, you should consider only soft and hard cores, because firm cores are not in widespread use and are hybrids of the other two core types.
This testability scheme modifies your design's flip-flops and latches to allow serial read-in and readout of a core's logic states in a scan-test mode.
Another company selling analog and mixed-signal DFT and testability tools, OpMaxx, offers DesignMaxx for measuring analog circuit sensitivity to dc, ac, and transient simulation; FaultMaxx for analog fault-coverage analysis; and TestMaxx for generating analog tests and detecting hard and soft faults in analog circuits.
www.edn.com /archives/1998/021698/04df_01.htm   (3519 words)

 Using Testability to Guide Assertion Placement   (Site not responding. Last check: 2007-10-15)
The creative idea of this project was to use testability scores (which are derived from a fault injection technique called sensitivity analysis) to suggest where assertions can find faults that a test suite cannot.
Testability scores are composed of three factors: execution estimates, infection estimates, and propagation estimates.
It is not until low testability scores are observed that concern should occur, since the lower scores indicate that testing is unlikely to find faults at those places.
hissa.nist.gov /latex/node25.html   (798 words)

 A.T.E. Solutions, Inc. | Testability Director   (Site not responding. Last check: 2007-10-15)
The Testability Director is a spreadsheet template, which guides in the development of testable designs.
If the Overall Testability Score needs to be improved, the designer could return to this section and exchange the non-standard modules for a standard one, thereby improving the scores.
If you are concerned about making changes to The Testability Director, simply contact us at experts@BestTest.com and we will be happy to add your criterion to your software for you at no charge.
www.besttest.com /OurProducts/TestabilityDirector   (980 words)

 Testability Review
Testability must be a design consideration from the very beginning.
If you are so inclined, you can use these guidelines to perform your own testability review.
Remember, the most cost effective time to insure testability is during design.
www.testsoftware.com /services/genrad/testability_review.asp   (225 words)

 MfgDTF Testability Working Group
The Testability White Paper documents the approach to improving the testability of domain standards that is being tried within the Manufacturing Domain Task Force.
Work is underway to apply the testability white paper to PDM Enablers in both the PDM Enablers 1.4 Revision Task Force and the PDM Enablers 2.0 joint submitter team (a.k.a.
The Testability White Paper came out of the experience and lessons learned from an experiment in developing conformance tests for an early version of PDM Enablers.
www.omg.org /homepages/mfg/mfgtest.htm   (488 words)

 Automated Testability Tips
The irony is that the more dynamic the application, the greater the need to test and the higher the potential number of scenarios needing to be tested, both of which cry out for automation.
The class library for an application should be well defined, which means not allowing developers to sneak in their favorite class just because they used it before, or having three different classes for the same type of control.
Now you might think these suggestions are pretty simple and obvious, and the truth is that they are simple, but based on the current state of application development, they must not be obvious.
www.stickyminds.com /se/S6013.asp   (804 words)

 Carnap, Rudolf [Internet Encyclopedia of Philosophy]   (Site not responding. Last check: 2007-10-15)
Carnap maintained his definitions of statements in his article “Testability and Meaning” (1936) and his book Meaning and Necessity (1947).
In “Testability and Meaning,” he introduced semantic concepts: a statement is analytic if and only if it is logically true; it is self-contradictory if and only if it is logically false.
Popper showed not only that some metaphysical terms can be reduced to the observational language and thus fulfill Carnap's requirements, but also that some genuine physical concepts are forbidden.
www.iep.utm.edu /c/carnap.htm   (5674 words)

 Novel techniques for improving testability analysis   (Site not responding. Last check: 2007-10-15)
The purpose of a testability analysis program is to estimate the difficulty of testing a fault.
Among those, the Controllability and Observability Procedure COP (1984) can calculate the testability value of a stuck-at fault efficiently in a tree-structured circuit but may be very inaccurate for a general circuit.
The algorithm of TAIR (Testability Analysis by Implication Reasoning) proposes a testability analysis algorithm, which starts from the result of COP and then gradually improves the result by applying a set of rules.
csdl2.computer.org /persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/ats/2000/0887/00/0887toc.xml&DOI=10.1109/ATS.2000.893655   (265 words)

 design and testability ltd.
We are confident in our ability to solve your testability and integration problems through hardware, software or hybrid solutions.
We have been associated with testability and BIT concepts from sub-component level through to system level both in military and civil environments (MILS STD 2165, DEF STAN 00-13).
For Testability, the challenge is extracting and utilising the optimum level of self-test capability from a COTS item and enhancing or underpinning this with robust communication protocols and polling mechanisms.
www.design4testability.co.uk   (661 words)

 [Abstract] A Testability Analysis for Data-Flow Designs of Reactive Real-Time Systems   (Site not responding. Last check: 2007-10-15)
This is where a testability analysis can help, by appraising the ease with which testing can be undertaken.
In this paper, we propose a method to analyze automatically the testability of data-flow designs of reactive real-time sys tems.
This method, which is based on the SATAN technol ogy, allows testability of reactive systems to be measured very soon during specification stage.
www.actapress.com /PDFViewer.aspx?paperId=17543   (204 words)

 Design for Testability
Meeting these goals within time constraints is made difficult by two factors: the complexity of today’s ICs, and the impracticality of designing first and adding testability later.
However, for all but the most trivial designs, manual insertion of DFT structures is time- consuming, and automation of this process is essential.
A testability environment contains two windows for concurrent browsing of testability and fault data.
www.evaluationengineering.com /archive/articles/0997dft.htm   (2318 words)

 Design for Testability and for Built-In Self Test   (Site not responding. Last check: 2007-10-15)
In this course you will learn all aspects of Design for Testability, from what it is, why you might need it, why someone would object to it, and what it can and cannot accomplish.
Analog circuit testability builds on the IEEE-1149.1 and is now the Mixed-Signal testability standard, designated as IEEE-1149.4.
This is a design course, intended for designers and for those who motivate them for testability, namely test engineers.
www.besttest.com /courses/DFTBIST.htm   (605 words)

 The Braidy Tester : Testability Improves Your Product
I've talked about testability before, but I recently had an experience that reinforced for me how improving testability directly improves the product.
Mark that - considering testability drove us to a decision that makes the product usable in a whole set of scenarios we had not originally thought of.
We might perhaps have ended up at this point eventually, but testability drove us there early.
blogs.msdn.com /micahel/archive/2005/10/12/TestabilityImprovesYourProduct.aspx   (399 words)

 MIL-HDBK-470A: C.2.2.1 - Testability
Many of the testability and diagnostics guidelines in Sections C-3 and C-4 have been excerpted from RL-TR-92-12, TESTABILITY DESIGN GUIDE RATING SYSTEM: Testability Handbook, dated February 1992.
The remainder of RL-TR-92-12, Volume I, provides detailed guidance on testability design techniques and structured test techniques for the categories of part types and technologies shown in Table C-III on the following page.
Are testability features included by the system designer documented in the Test Requirement Document (TRD) in terms of purpose and rationale for the benefit of the test designer?
www.bmpcoe.org /library/books/mil-hdbk-470a/00007a72.html   (2697 words)

 Design for Testability Software Released
The Testability Director provides several hundred guidelines for improving testability of ICs, x-ray inspection, optical inspection, board level test using both flying probe and bed-of nails fixturing, functional board test and system-level designs.
After assigning weights to criteria and groups of criteria, the testability reviewer can score the extent to which these criteria are met.
Rather, Ungar emphasizes that the greater value of The Testability Director comes from establishing and managing a “process of communicating testability considerations across at least three disciplines: design, test and management.
www.ateworld.com /news/view_details.cfm?id=273   (692 words)

 letters from babylon: More on Testability in Science   (Site not responding. Last check: 2007-10-15)
I would like to continue some thoughts from my last post, on testability in science.
It can certainly be argued that testability is only one feature of scientific theories.
Let us imagine for the moment, however, a theory that is currently and for the foreseeable future untestable and that gives rise to no other testable theories.
www.lettersfrombabylon.com /2004/12/more_on_testabi.html   (785 words)

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