Insights · Index
Insights
Practical guides and field case studies on WBS, Gantt charts, baselines, and EVM — insights for professional project managers.
Guides
11Single-topic reads, ordered from setup to reporting.
01
How to Create a WBS: 5 Steps from the 100% Rule to 8/80Build a WBS in five steps — start from the deliverable, decompose with the 100% Rule, size with 8/80, and de-duplicate with mutual exclusivity. Includes a 30-minute completeness checklist.02
Gantt Dependencies Explained: FS, SS, FF, SF and Lead/LagWhat FS, SS, FF, and SF each promise, and where lead and lag belong — get them wrong and your critical path lies to you.03
How to Calculate SPI and CPI: An EVM PrimerCompute and read SPI and CPI from three numbers — PV, EV, AC — with a worked example and the two cases where SPI lies.04
How to Measure Progress: 6 EVM Methods from the 0/100 Rule to Physical MeasurementProgress is the output of a measurement method, not a guess — the six EVM methods (fixed formula, weighted milestone, percent complete, physical measurement, apportioned effort, LOE) and how to pick one for each kind of work.05
How to Make a Gantt Chart: From WBS to a Working ScheduleA Gantt chart is computed, not drawn — five steps from WBS through durations, dependencies, CPM and a baseline, plus where Excel Gantt charts fall apart.06
How to Write a WBS Dictionary: Definition, Deliverables, Acceptance CriteriaThe WBS tree lists the work; the dictionary is each box's contract — how to write definition, deliverables and acceptance criteria, with bad and good examples, and where to start.07
Scheduling in Working Days, Not Calendar DaysA five-day task isn't due five days from now — calendar vs working days, three traps in Korean public holidays, per-project calendars, and a deadline computation you can verify by hand.08
How to Share a Gantt Chart: From Screenshots to Read-Only LinksMost schedule-sharing failures come from sharing all-or-nothing — roles (owner, pm, member, viewer) for people who edit, one read-only link for people who watch, and a table for choosing between them.09
WBS and Schedules in Excel: Where They Work, Where They BreakExcel is a reasonable place to start a WBS and schedule — the question is when to stop. The three points where a table and a schedule model part ways, when Excel is still the right call, and the signals that it is time to move.10
Choosing a Microsoft Project Alternative: What Actually MattersMicrosoft Project is the deepest scheduling engine around — people look for alternatives not because it is bad, but because it does not fit. Four criteria for choosing: WBS, baselines, honest schedule computation, and whether your team will use it.11
Why a WBS Is Hard to Keep in Jira — and How to Pair the TwoJira is the standard for execution, but a WBS demands a different kind of structure — three mismatches around the 100% Rule, schedule computation, and reporting language, and a coexistence strategy that keeps planning in the WBS and execution in Jira.
Case Studies
7What changed when we put it on a real project.
01
We Let Claude Build an Entire SI Project's WBSConnected over MCP, Claude drafted, refined, scheduled, and defined the WBS for a 6-month manufacturing ERP build — recall by machine, commitment by human.02
This Week's Status Report Was Extracted, Not WrittenOne export button on the ERP project from our last case study produced four sheets — overview, WBS, weekly, monthly — and a clear boundary between what fills itself and what only a human should write.03
We Bolted a Risk Register onto That ERP ProjectOn the same ERP project, we identified, assessed, responded to, and monitored eight risks on a 5x5 matrix — a risk pinned to a WBS node rides along every time you look at the plan.04
Seven Weeks In, That ERP Project Started to SlipWith a baseline set and progress in, SPI 0.84 raised the alarm first — an execution report tracing the slip down to the responsible work packages.05
When Was This Deadline, Originally?Right after a schedule revision, we replayed it in the change history — field-level old→new with who and when, and what never gets recorded.06
If One Task Slips Three Days, How Late Is the Project?We fed in +3 days and CPM recomputed the chain — zero delay at first, until a missing line surfaced. Fill it in, and the critical path moved house.07
We Wrecked the Whole Plan. Undo Wasn't EnoughPinned BL-2 as a checkpoint right before a risky edit, then rolled a plan — a whole phase wiped out by one accident — back to the snapshot: auto backup, progress preserved, all-or-nothing.
Series
6A set meant to be read in order, each part standing on its own.
S1
The Six Moments a Project Falls ApartSix points where a plan comes apart, from kickoff to control.
PM Glossary — direct definitions of core terms →WBS template gallery →