The Critical Chain Method (CCM) is a schedule method that focuses on the management of remaining project durations and resources. According to the PMBOK® Guide and related PMI standards, it differs from the Critical Path Method by accounting for resource availability and uncertainties through the use of buffers.

Buffers: Instead of adding safety margins to every individual task (which often leads to " student syndrome " or procrastination), CCM aggregates the uncertainty into specific buffers.

Project Buffer: Placed at the very end of the critical chain to protect the target delivery date from slippage along the main sequence of tasks.

Feeding Buffers: Placed at points where non-critical chains of tasks merge into the critical chain, ensuring that delays in supporting tasks do not stall the primary schedule.

Resource Constraints: While the Critical Path Method (CPM) focuses on logical dependencies, the Critical Chain Method develops a schedule that is both logically and resource-constrained. The " critical chain " is defined as the longest sequence of tasks that considers both task dependencies and resource limitations.

Comparison with other options:

A. Critical path method: This calculates the theoretical early and late start/finish dates based on logical paths but does not inherently account for resource limitations or use buffers in this specific manner.

C. Resource leveling: This is a technique used to adjust start and finish dates based on resource constraints, often resulting in the critical path changing or lengthening, but it is not a " method " defined by the placement of buffers for uncertainty.

D. Schedule network analysis: This is the overarching technique of identifying the project ' s schedule, which includes methods like CPM and CCM, but is not the specific method described in the prompt.