While computer software can be a powerful tool for creating and managing project schedules, it is not always necessary to use it. The PMBOK® Guide acknowledges various tools and techniques for schedule development, including but not limited to software. Depending on the project’s size, complexity, and requirements, schedules can be created using simpler methods like whiteboards, paper, or spreadsheets. The key is to choose the most effective tool that suits the project’s needs and stakeholders’ preferences.

References: = The PMBOK® Guide’s Schedule Management knowledge area discusses different tools and techniques for developing a project schedule, which does not mandate the use of computer software12.