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ProjectFix: Multi-Resource Work Calculation Plugin for Microsoft Project

A lightweight Microsoft Project add-in (Office COM add-in) that runs inside Project, detects multi-resource work calculation errors in real-time as users build or edit tasks, flags them with a visual warning, and auto-corrects them with one click. Works offline; no cloud required.

PLUGIN

22 weeks • 70% confidence

Value Proposition

Catches errors immediately during task setup, preventing downstream cascade. No workflow disruption (works inside Project). One-time purchase, no SaaS fees. Faster than manual workarounds or external audits.

Target Audience

Individual project managers and small teams (5–50 people) using Microsoft Project on Windows desktops who want to prevent errors at task-creation time rather than audit after the fact

Key Features

  • Real-time detection: flags task when 2nd+ resource added and work total diverges from expected formula
  • Visual indicator: red badge on task name; tooltip shows 'Work total mismatch: expected 80h, calculated 64h'
  • One-click auto-correct: recalculates work field using correct multi-resource formula
  • And more, with full implementation detail...

Tech Stack

C# or VB.NET (COM add-in development) Microsoft Project SDK (MSDN docs) Office COM Interop libraries Visual Studio (IDE for add-in development)
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Original Problem

Microsoft Project resource work calculations fail for multi-resource tasks, causing inaccurate project timelines and budget estimates

Project managers using Microsoft Project experience a critical bug where work totals only calculate correctly for the first resource assigned to a task, while subsequent resources show incorrect aggregations. This causes cascading errors in project schedules, resource allocation planning, and budget forecasting, forcing teams to manually recalculate or use workarounds that consume hours of administrative time.

Score: 17.5%