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HP Photosmart C6380 All-In-One Inkjet /non-functional $21.99 |
One Non Functional Information
Types of Non Functional Testing
There are many varying definitions for different types of non-functional tests. While we are not attempting to be definitive, Testing Performance would like to state what we mean by different types of non-functional tests.
The Performance Test
This is a test which measures, or determines the performance of, an application or an application component. Of all non-functional testing, this is probably the most the most commonly executed type of test.
The overall purpose of a performance test is to determine if the application will be functionally correct even at high workloads.
The objectives of a performance test would be something along the lines of;
- Determine if the application can support the expected workload.
- Find and resolve any bottlenecks.
It is very difficult (i.e., time consuming and expensive) to build and replicate in a test environment an exact simulation of the workload that the application will be expected to process in production. It is much easier (i.e., quicker and cheaper) to build an approximation of the workload. Often the 80:20 rule is used to persuade project managers that an approximation makes more sense. That is, 80% of the workload is generated by 20% of the functionality. Of course, no two applications are the same, in some we can easily achieve 90:10, in others it is more like 70:30. Careful analysis by the performance tester will help determine the volumetrics for the application and therefore which functions will be included in a performance test. Using the 80:20 rule is in essence compromising the testing effort. While some or most performance issues will be detected, performance issues associated with functionality not included in the performance test could still cause problems on release to production. Further steps can be made to minimise this possibility, including:
- Manually key functions while a performance test is executing.
- Observe and measure performance, especially database performance, in functional test environments.
Once an approximation of the production workload has been determined and agreed, the performance tester works towards building the automation together into a workload that can be executed in an orderly and controlled fashion. The work early on in the performance testing process becoming a good foundation on which to analyse and publish results, ultimately determining if the application can or cannot meet the specified objectives. Performance tests usually need to be run multiple times as part of a series of test tune cycles. Where a performance bottleneck is detected, further tests are run with an ever increasing amount of tracing, logging or monitoring taking place. When the cause of the problem is identified, a solution is devised and implemented. Again, the performance test is re-run to ensure the performance bottleneck has been removed. It is of course quite difficult to determine how many performance issues will be detected as part of a performance testing exercise. The table below is a simplistic guide to the number of performance testing cycles that may be executed depending on the origins of the application.
Applications origins
Number of test tune performance testing cycles required for first release
Number of test tune performance testing cycles required for a maintenance drop in the first 6 months after first release
Number of test tune performance testing cycles required for a maintenance drop more than 6 months after first release
An off the shelf package with a minimum of customisation
4 3 2
An off the shelf package heavily customised.
6 3 2
A bespoke application
10 6 3
From time to time this article will be updated and enhanced, should you be interested in learning more or would like <a href=”http://www.testingperformance.org/index.php”>Testing Performance Ltd </a> to undertake performance testing of your Contact Centre please feel free to contact us.
About the Author
Sascha is a leading performance consultant in the UK. He is founder of
Testing Performance Ltd a specialist company dedicated to providing
performance testing services.
One Non Functional Question
Is signing an AS IS contract on a used vehicle the death of your credit, if the car becomes non functional?
I bought a used chevy suburban. I thought I made a good purchase. I generally take care of my vehichels. The car began giving me grief 20 days after I bought it. The finance company deferred one payment because I had to pay nearly $300 to fix it. This weekend the truck broke down again and the cost of repair will exceed $2000. I asked the finance company if there were any options for me and I was told no, because I signed an AS IS contract. I need my vehicle to work but I don’t have the money to keep pouring into this lemon. We have car dealers here, that offer the push, pull or drag deals. They say they will pay off you trade no matter what you owe. Is this my only choice or do I have other options?
Even if they pay off your trade, you’re still gonna pay for both vehicles. They pay it off then add that amount to the new car.
You are still protected under the lemon law in most states tho. Find your states Lemon Law and see what can be done. You’d do best to get a lawyer and take the fight to them. It’s gonna take time you don’t have to get out of it tho.
If this is a small mom and pop place I would take it back to them tell them keep it. If it’s a big finance company they will ruin your credit as voluntary Repos are worse than just not making your payments.
Did you try taking it to different shops to get more estimates? $2000 is a lot of money for anything on a car and you may be getting ripped off. Only a Transmission or Engine rebuild would cost that much and that qualifies as a lemon in most places.
I have a problem with my JUST bought Yashica 635.?
I have no idea how to operate it. I know that the shutter has something to do with one of the levers on the side, but when I pull it it doesn’t fire. Does it require batteries anywhere inside of it? Will the shutter only work with film? Is my camera non-functional because it won’t fire with the lens? Does anyone know where I can get a 35mm film adapter for it (if I can get it to work, of course)?
thanks, all of you!
Follow my tumblr @: bornfromblue.tumblr.com
http://www.butkus.org/chinon/yashica/yashica_635/yashica_635-splash.htm
This is a link to a pdf file that you can download for the manual for this camera. As for a 35mm adapter, they are available. Try ebay.
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One Non Functional Video
The Gmod Short Stories 1 – Dr.Breen and the non-functional Haax
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