Which planning document is primarily focused on outlining time sequencing?

The planning document that is primarily focused on outlining time sequencing is the preliminary logic diagram. This diagram, often used in project scheduling, visually represents the sequence of activities and the relationships between them, helping to establish the order in which tasks need to be completed. It highlights dependencies between tasks, such as which ones must precede others and which can occur concurrently. By doing so, the preliminary logic diagram serves as a foundational tool for creating a comprehensive project schedule, allowing for a clear understanding of the timing and flow of project activities.

In contrast, other choices such as the work breakdown structure (WBS) focus on defining project deliverables and the hierarchical breakdown of tasks rather than their timing. The budget estimate report centers on financial planning, not chronological sequencing. Lastly, the risk management plan addresses potential risks but does not delve into the time sequencing of project tasks. Therefore, the preliminary logic diagram is the correct choice for outlining time sequencing within project planning.