How can you identify the most critical test cases?

Function based testing is the most comprehensive- that’s why: often when we draft a technical tender, specification states: all listed features, including those hidden and mandatory to operate the system. Contractors only go by what is written because they look on other from financial eye. Thus one of the values given by Engineering management

Take an e-commerce website as an example and the user path from the homepage to successful checkout (customer purchase). This flow is the business's heartbeat and through risk-based testing, we examine the impact and likelihood of failures in this journey. Now, imagine a bug in the cart/basket that breaks the checkout process - it's not just a glitch but a potential revenue sinkhole and a trust buster. Considering risk-based testing here, we zero in on high-risk areas (or flows), giving more confidence that code changes and deployments won't disrupt this crucial path. Based on that your team can start building the safety net - this could be a QA process like automated E2E regression tests.

The critically of using testing resources is largely a function of prioritize the factors affecting the stakeholders. It prevents the displeasure and convince them on ongoing progress in the test coverage.

These scenarios are based on known errors, which will consist part of testing and commissioning protocols but that is only valid when installation phase requirements are met. Say for example, dust free environment is required for electronic system installation- that is a different evaluation for construction manager (finished constructing) and hygiene officer (iso8 cleanness for example) t&c will be successful based on scenarios but later problems will appear to due difference in concepts

That is ok inside a unit, when you have a system you can’t prioritize but you can use stages or versions. So stage one we do t&c till that point and then we iterate.. also t&c and operability are two different & demanding stages. Contracts management come in play here

1. Identify the critical requirements and all the test cases traced to these requirements are obviously critical. 2. Go for MCDC, by default all the MCDC test cases are critical.

Instead of prioritizing test cases, update your development process to include unit test for every feature you build. You can explore test driven methodologies and you can use tools to keep track of your code coverage. Aim to have at least 60% code coverage and make sure to implement checking for tests in your code review process.