Delay classification

Whenever an activity or task is delayed, your project team can cite a reason from a pre-defined list of common construction delay causes. The Delay Classification widget then shows which reasons cause the most delays.

You find the widget in Insights, on both the Overview tab and the Weekly tab.

Reasons users pick

Users pick a reason in the Delay confirmation window. The reasons sit under two headings.

Technical Delay

• Approval / Permits
• Client Decision: for example, a change in design.
• Contracts: contract issues delay the project.
• Drawings: for example, drawings lack information, so work cannot go on.
• Inspection: the authority carries out an extra inspection.
• Material: for example, material delivery to site was late.
• Method statement: for example, a new method statement takes extra time after a redesign.
• Minor / Temp pre-requisite work
• RFI (Request for Information)
• Safety Requirement
• Others

Site Delay

• Access / Space: site readiness. For example, the storage area has not been cleared for the next activity.
• Covid 19
• Defects/Rework: for example, low quality work must be done again.
• Equipment: for example, the crane is not available.
• Logistics / Storage: for example, there is no storage space, so material goes back to the supplier.
• Labor: not enough workers to carry out the work.
• Weather: for example, work stops because of rain.
• Unforeseen Site Conditions: for example, ground conditions.
• Others

Reasons the app adds

The app records some reasons itself:

• Delay on first lookahead
• Do List confirmation
• Creation of dependency and Change in dependency
• Deletion of activity, Deletion of activity dependency, Deletion of task dependency and Deletion of constraint
• Creation of activity
• Version change
• Reset of task progress
• Pending
• Workflow Rescheduled: a delay when a Flow workflow is rescheduled.

Re-Scheduling and Schedule error can no longer be selected. They still show in Insights for older delays recorded with them.

The three groups

The widget sorts reasons into three groups:

• Preventable by getting valid commitments: Labor, Defects/Rework, Equipment.
• Preventable by making plan reliable and robust: Inspection, Approval / Permits, Client Decision, Contracts, Drawings, Material, Method statement, Minor / Temp pre-requisite work, RFI, Safety Requirement, Access / Space, Logistics / Storage, and the app's own reasons for the first lookahead, Do List confirmation, creation, change and deletion of activities and dependencies, and Reset of task progress.
• Unforeseen / external conditions: Weather, Unforeseen Site Conditions, Covid 19, Others.

Schedule error, Re-Scheduling, Version change, Deletion of constraint and Workflow Rescheduled belong to no group.

Read the chart and table

The chart shows the reasons for delays in activities, tasks and constraints. Use its toggle to sort the reasons by Occurences, Total Delay (days) or Total Project Delay (days).

The table under the chart lists each Delay Reason with:

• Occurrences: how many times users cited it.
• Total Delay (days): the days the activities, tasks and constraints themselves were delayed.
• Total Project Delay (days): the days the project end date moved.

Chart 1

Chart 1 sorts delay reasons by the number of times users cited them. In a sample project, Materials was the most used reason (203 times), followed by Schedule error (171 times).

Chart 2

Chart 2 sorts delay reasons by the number of days they delayed the project. In a sample project, Schedule error was the main reason. It delayed the project by 194 days.