What earned value tells you that a bar chart does not
A Gantt shows intent. Earned value shows achievement against that intent in a single comparable number. Schedule performance index (SPI) compares work earned to work planned; cost performance index (CPI) compares work earned to cost spent. Read together across updates they show whether recovery is real or rhetorical.
The hard part in construction is rarely the formula — it is getting consistent data out of successive programme updates. TideLine takes the updates as they are and computes the curves from them.
From update to executive report
Load each monthly update, and TideLine recalculates progress, float and earned-value metrics. The Metrics module holds the analytics; the AI Advisor drafts a schedule-health or progress narrative grounded in the actual figures, which you can edit before it goes out.
The result is a monthly report cycle measured in minutes rather than days, with the same method applied every period.
Where EV meets delay analysis
Loss of productivity and disruption claims live or die on trend evidence. Earned-value curves across contemporaneous updates are among the clearest ways to show that output rate fell, and when. TideLine keeps those curves next to the delay windows and the critical-path movement that caused them.