Activities Step Schedule: The Four-Step Schedule Development Process

PMBOK v8 Definition

The Activities Step Schedule consists of four sequential steps to developing the project schedule: (1) Define activities, (2) Determine sequence, (3) Estimate effort and duration, and (4) Adjust. This process is part of the Schedule performance domain and involves identifying and documenting specific actions to produce project deliverables, determining logical sequence and dependencies, estimating work periods, and making final adjustments to create an approved baseline.

Why It Matters for the Exam

This concept appears frequently in PMI exam questions about the Schedule Management knowledge area, particularly in process order questions and tool application scenarios. Expect 2-3 questions testing your ability to identify the correct sequence of steps and distinguish between artifacts produced at each step.

Key Points to Remember (for the exam)

• Four Steps in Order: Define Activities → Determine Sequence → Estimate Effort and Duration → Adjust (memorize this sequence)
• Step 1 - Define Activities: Decomposes work packages into schedule activities; key artifacts are activity list, activity attributes, and milestones
• Step 2 - Determine Sequence: Focuses on logical sequence, dependencies, and relationships among schedule elements (which activities precede others)
• Step 3 - Estimate Effort and Duration: Determines work periods required; expressed in hours, days, or weeks
• Step 4 - Adjust: Final review and revision of duration estimates, resource estimates, and schedule reserves to establish an approved baseline
• Key Output: The project schedule presents linked activities with planned dates, durations, milestones, and resources
• Common Confusion: Do not confuse "Define Activities" (Step 1) with "Sequence Activities" (Step 2) - defining comes before sequencing

Typical PMI Exam Example

A project manager has decomposed work packages into schedule activities and created an activity list with attributes. According to PMBOK v8, what is the NEXT step in developing the schedule? Answer: Determine the logical sequence of activities, including dependencies and relationships among schedule elements.

PMI Exam Traps

• Trap: Confusing "Define Activities" with "Create WBS"

• Reality: Define Activities decomposes work packages (already defined in WBS) into schedule activities; WBS creation is a Scope process

• Trap: Thinking "Estimate Effort" and "Estimate Duration" are separate steps

• Reality: They are combined in Step 3 - both effort and duration are estimated together

• Trap: Believing the schedule is complete after Step 3

• Reality: Step 4 (Adjust) is mandatory - it involves reviewing and revising estimates to establish the approved baseline

• Trap: Confusing "milestones" (Step 1 output) with "schedule baseline" (Step 4 output)

• Reality: Milestones are identified in Step 1; the baseline schedule is established only after Step 4 adjustments

Important PMI Connections

Quick Review Questions

1. What are the four steps for developing the schedule, in correct order?
2. Which artifacts are produced during Step 1 (Define Activities)?
3. What is the key difference between Step 2 (Determine Sequence) and Step 3 (Estimate Effort and Duration)?
4. Why is Step 4 (Adjust) critical before establishing the project schedule baseline?
5. How does the project schedule differ from the schedule model?

PMBOK v8 Reference

Section 2.5 - Schedule Performance Domain (Figure 2-23: Steps for Developing the Schedule)