The Surprising Cost of Bad Estimates

Bad plans create late deliveries, scope cuts, overtime, burnout, frustration, and bugs. The article argues that a deeper cost is lost credibility: when teams are repeatedly wrong, stakeholders stop treating their estimates as reliable and stop engaging with them as equal partners.

Reading notes

#

• Consistently bad plans make stakeholders distrust the team’s future estimates.
• When a team has a track record of missing deadlines or dropping scope, stakeholders may push for the earlier date anyway.
• Adding padding to plans usually makes the problem worse because the team then has to estimate both the work and the padding.
• A better response is to look at why plans have been wrong.
• One useful technique for chronic underestimation is unpacking the work into smaller parts.
• Unpacking helps identify the components of work, but the original larger item is still estimated.
• Estimating small parts and summing them can produce worse estimates.
• Some teams estimate well and still deliver late because the backlog is bigger than expected.
• The unknown backlog includes work not yet identified and emergent requirements.
• A project buffer can account for part of that unknown backlog, using an approximate adjustment.
• Reliable planning matters for coordination, training, marketing, funding, shareholder guidance, manufacturing, and shipping commitments.