If all data fall between 3 Sigma levels, what percentage of the product is acceptable -- defect free?
1-.015 = .985
The probability is determined by the binomial distribution. We consider p = probability of defect, q = probability of not defect, n = sample size, and x= number of defects in sample, in this case x=2. We calculate the probability as P(X = x) = n!/[(n-x)! x!] pxqn-x If sample size = 10 and p = 0.1 then: P(x= 2) = 10!/(8!x2!)(0.1)2(0.9)8 = 0.1937 You can find more about the binomial distribution under Wikipedia. It is important also to note the assumptions when using this distribution. It must be a random sample and the probability of defects is known.
Testing random samples of wild animals to decide whether they are healthy Testing 1 in 10 of a company's products to determine that they are defect-free
Regression testing and confirmation testing are both important parts of the software testing process, but they serve different purposes. Confirmation testing (also called re-testing) is done to verify whether a specific bug or defect that was reported earlier has been successfully fixed. It focuses only on the particular issue that was identified and ensures that the fix works as expected. Regression testing, on the other hand, is performed after confirmation testing to check whether the recent changes (like bug fixes or new features) have affected the existing functionality of the application. It helps ensure that no new issues have been introduced elsewhere in the system. Both testing types are essential for maintaining software quality. If you're learning about these testing strategies in depth, institutes like Uncodemy include them as part of their software testing training, combining theory with hands-on practice to help students understand real-world QA scenarios.
"A Pareto chart may look at first glance like a histogram, but there are two key differences. The first is that the x variable is categorical rather than numerical. For instance, the x variable may be type of defect. The second difference is that the bars are arranged in decreasing order of frequency."More at: http://www.brighthub.com/office/project-management/articles/46732.aspx
A defective product has a defect: "My phone is defective" "What defect does it have?" "The defect is that the screen is broken" To defect can also mean to switch sides e.g. from an army or a political party
Any characteristic of a product that hinders its use for its intended purpose is a product defect. The defect can cause a product to be dangerous or useless.
If it is a manufacture defect from the product, then yes it should be refunded. If it is a fit or style issue then it will be returned with a percentage for restocking and shipping charges.
The formula for residual defect density in QA is: Residual Defect Density = (Number of defects remaining after a phase / Size of the phase). It is used to measure the effectiveness of defect removal in a particular phase of the software development process.
By suing the company that made a product with a defect.
Severity and Priority are the attributes of a defect. If we talk about 'Severity of a defect' then it describes how the defect is impacting the functionality of software product whereas 'Priority of a defect' indicates the importance of the defect and when it should be addressed or fixed.In the software project, the severity of a defect should be defined by QA whereas the priority should be defined by Product Owner.Severity of the defect can be categorized into four levels: blocker, critical, major & minor. Similarly, Priority of the defect can be high, medium & low.An organization that provides software testing services needs to ensure that while opening defects, each defect should be assigned with right severity. Incorrect severity and priority mapping will impact overall STLC process and the whole product.
A proven manufacturing process that produces a specific product with absolutely no defects either in quality or performance. Zero defect basically is a ideal case, put forward by Philip Crosby. Some argue that zero defects is an unrealistic target and other managment systems strive for acceptable defects such as those found in "six sigma".
As a verb: Many people chose to defect rather than live under Communist rule.As a noun: If there is a manufacturing defect, take it back to the store to exchange.
The term 'hole-in-the-heart' usually means that there is a defect in the wall between two of the heart's chambers. If the defect is between the atria the condition is called an atrial septal defect or ASD and if the hole between the ventricles is known as a ventricular septal defect or VSD.
A proven manufacturing process that produces a specific product with absolutely no defects either in quality or performance. Zero defect basically is a ideal case, put forward by Philip Crosby. Some argue that zero defects is an unrealistic target and other managment systems strive for acceptable defects such as those found in "six sigma".
During the manufacturing process, once the product is finished, a quality control process is usually followed where defects are detected--hence defect detection.
defect prevention includes those strategies through which we avoid to occur a defect. for example formal risk analysis, prototyping. in defect prediction those areas are highlighted where there is possibility that defect can occur.