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Alternatives to testing

Software testing is more and more considered a problematic method toward better quality. Using testing to locate and correct software defects can be an endless process. Bugs cannot be completely ruled out. Just as the complexity barrier indicates: chances are testing and fixing problems may not necessarily improve the quality and reliability of the software. Sometimes fixing a problem may introduce much more severe problems into the system, happened after bug fixes.

Using formal methods to "prove" the correctness of software is also an attracting research direction. But this method can not surmount the complexity barrier either. For relatively simple software, this method works well. It does not scale well to those complex, full-fledged large software systems, which are more error-prone.

In a broader view, we may start to question the utmost purpose of testing. Why do we need more effective testing methods anyway, since finding defects and removing them does not necessarily lead to better quality. An analogy of the problem is like the car manufacturing process. In the craftsmanship epoch, we make cars and hack away the problems and defects. But such methods were washed away by the tide of pipelined manufacturing and good quality engineering process, which makes the car defect-free in the manufacturing phase. This indicates that engineering the design process (such as clean-room software engineering) to make the product have less defects may be more effective than engineering the testing process. Testing is used solely for quality monitoring and management, or, "design for testability". This is the leap for software from craftsmanship to engineering.

Test techniques

One of the aims of testing is to reveal as much potential for failure as possible, and many techniques have been developed to do this, which attempt to “break” the program, by running one or more tests drawn from identified classes of executions deemed equivalent. The leading principle underlying such techniques is to be as systematic as possible in identifying a representative set of program behaviors; for instance, considering subclasses of the input domain, scenarios, states, and dataflow.

It is difficult to find a homogeneous basis for classifying all techniques, and the one used here must be seen as a compromise. The classification is based on how tests are generated from the software engineer’s intuition and experience, the specifications, the code structure, the (real or artificial) faults to be discovered, the field usage, or, finally, the nature of the application. Sometimes these techniques are classified as white-box, also called glassbox, if the tests rely on information about how the software has been designed or coded, or as black-box if the test cases rely only on the input/output behavior. One last category deals with combined use of two or more techniques. Obviously, these techniques are not used equally often by all practitioners. Included in the list are those that a software engineer should know.

Questions & Answers

Which SDLC Model will you select to develop the system as a software engineer and why?
Subrato Reply
communication techniques in software development
SANJANA Reply
👋👋👋
Aslam
what is communication techniques in software development
Aslam
hii
Ritika
hi
prabhu
Hlw
Subrato
who is Charles Babbage
Marvin Reply
how to do documents in the computer
Mark Reply
Kashmir
akmal
k
akmal
hello
Anil
Hi
Rohid
how are you?
Rohid
Which of these are standards for assessing software processes
own Reply
hello teacher may I give me example of format of software
Aurianne
team a found 342 errors during the software engineering process prior to release. team b found 184 errors. what additional measures would have to be made for projects a and b to determine which of the teams eliminated errors more efficiently? what metrics would you propose to help in making the determination? what historical data might be useful?
Kaviya Reply
it's depend upon software testing and debugging
OMKAR
Hi, Everyone
Rohid
what is coding
Waswa Reply
programming languages is a coding it is also used software development, designing, modeling, etc..
OMKAR
presently I work as a computer engineering what course can I study in any computer institute to enable me promoting myself
Ichaba
AND here lot of course
OMKAR
How to calculate the basic salary of a payroll in Java coding?
Adjei Reply
ত্তচুরভহব
Parvez
hello
Bahadur
but we have tobe serious in k.dge.. what is the meaning of java coding if you are gineous you will answer me
Eyiba
hie
Mark
hi
Rana
Quids on software engineering
Enongene Reply
software testing practice
Prerana
Ho
Rang
definition of software
Baba Reply
define system ,concepts of system and types of system?
Gurmeet Reply
iom
ADNAN
hello
arsh
hari Paulus hai
Hari
System is the way of Execution or a set of principles to do something or any task is called System.
Ayesha
There are many infinite forms and Types of System in different fields as well.
Ayesha
TELL ME ABOUT MAINFRAME?
OMKAR
hi
Md
System is the way of Execution or a set of principles to do something or any task is called System.
Sazed
is very important software engineer or not.
Riyanshu Reply
very important
arsh
2d
Dv
hello
Md
hi
Rohid
hi
martin
what is software engineering
Ravindra Reply
Software engineering is a detailed study of engineering to the design, development and maintenance of software
arsh
what is salary of software engineer
Akash Reply
it depend on organization's and quality
josephat
I think average salary 80000us dollars per year
arsh
what are naturs of software Engineering
BANDARU Reply

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Source:  OpenStax, Software engineering. OpenStax CNX. Jul 29, 2009 Download for free at http://cnx.org/content/col10790/1.1
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