Sakis is developing a mission-critical application that has a direct impact on human safety. Time and cost are less important than correctly functioning software. Which of the following software development methodologies should he choose given these requirements?

Despite many organizations moving to Agile, DevOps, or other more responsive development methodologies, waterfall remains a strong contender when clear objectives and stable requirements are combined with a need to prevent flaws and to have a high level of control over the development process and output.