What is Stress Testing?
Stress testing provides your doctor with information about how your heart works during physical stress. Some heart problems are easier to diagnose when your heart is working hard and beating fast. During a stress test, you exercise (walk or run on a treadmill or pedal a bicycle) or are given a medicine to make your heart work harder while heart tests are performed. During these tests, your heart is monitored using images or through dime-sized electrodes attached to your chest, arms, or legs. You may be asked to breathe into a special tube during the test. This will allow your doctor to see how well youre breathing. You may have arthritis or another medical problem that prevents you from exercising during a stress test. If so, your doctor can give you a medicine that makes your heart work harder, as it would if you were exercising. This is called a pharmacological (FAR-ma-ko-LOJ-i-kal) stress test. Overview Doctors usually use stress testing to help diagnose coronary artery disease (CAD
I think of stress testing as measure of risk exposure that’s complementary to VaR. Stress testing is a measure of potential loss as a result of a plausible event in an abnormal market environment. Two types of stress testing are popular. The first is based on economic scenarios. Pretend your portfolio experiences the 1987 or 1997 stock market crash again. The second is “matrix” based. Change a bunch of assumptions about correlations and variances and see what happens. Neither is statistical in nature, in contrast to VaR. That is, you don’t know the probability of any particular scenario.
Stress testing provides your doctor with information about how your heart works during physical stress. Some heart problems are easier to diagnose when your heart is working hard and beating fast. During a stress test, you exercise (walk or run on a treadmill or pedal a bicycle) or are given a medicine to make your heart work harder while heart tests are performed. During these tests, your heart is monitored using images or through dime-sized electrodes attached to your chest, arms, or legs. You may be asked to breathe into a special tube during the test. This will allow your doctor to see how well you re breathing. You may have arthritis or another medical problem that prevents you from exercising during a stress test. If so, your doctor can give you a medicine that makes your heart work harder, as it would if you were exercising. This is called a pharmacological (FAR-ma-ko-LOJ-i-kal) stress test.
Stress testing is testing that investigates the behavior of software (and hardware) under extraordinary operating conditions. For example, when a web server is stress tested, testing aims to find out how many users can be on-line, at the same time, without crashing the server. Stress testing tests the stability of a given system or entity. It tests something beyond its normal operational capacity, in order to observe any negative results. For example, a web server is stress tested, using scripts, bots, and various denials of service tools.
Term often used interchangeably with ‘load’ and ‘performance’ testing. Also used to describe such tests as system functional testing while under unusually heavy loads, heavy repetition of certain actions or inputs, input of large numerical values, large complex queries to a database system, etc.
