Project quality management includes all of the following, except Project managers may need to be familiar with sampling, including attribute sampling (the results either conform or does not conform) and a variable sampling (the result is rated on a continuous scale that measures the degree of conformity). project life cycles range along a continuum from predictive to adaptive or agile. In a life cycle that uses a predictive approach, the project deliverables are defined at the beginning of the project an any changes to the scope are progressively managed. In adaptive or agile approach the deliverables are developed over multiple iterations where a detailed scope is defined and approved for each iteration when it begins. Prevention is preferred over inspection. It is better to design quality into deliverables, Rather than to find quality issues during inspection. The cost of preventing mistakes is generally much less than the cost of correcting mistakes when they are found by inspection or during usage. Quality and grade or different concepts. Quality is "the degree to which a set of inherit characteristics fulfills requirements" (ISO 9000). Grade is a category assigned to deliverables having the same functional use but with different technical