EVM Calculator

Overview

The EVM Calculator skill provides comprehensive automated calculation of all Earned Value Management metrics, indices, and forecasts. It supports PMI PMBOK and ANSI/EIA-748 compliant calculations for project cost and schedule performance measurement and forecasting.

Capabilities

Core EVM Metrics

• •Calculate Planned Value (PV/BCWS)
• •Calculate Earned Value (EV/BCWP)
• •Calculate Actual Cost (AC/ACWP)
• •Calculate Schedule Variance (SV) and Cost Variance (CV)
• •Calculate SV% and CV% for normalized comparison

Performance Indices

• •Calculate Schedule Performance Index (SPI)
• •Calculate Cost Performance Index (CPI)
• •Calculate Critical Ratio (CR = SPI x CPI)
• •Calculate TCPI (To-Complete Performance Index)
• •Support both BAC-based and EAC-based TCPI

Forecasting

• •Calculate EAC using multiple methods:
  • •EAC = BAC / CPI (typical performance)
  • •EAC = AC + (BAC - EV) (atypical performance)
  • •EAC = AC + [(BAC - EV) / (SPI x CPI)] (combined)
  • •EAC = Bottom-up re-estimate
• •Calculate ETC (Estimate to Complete)
• •Calculate VAC (Variance at Completion)

Visualization and Trending

• •Generate S-curve visualizations
• •Perform trend analysis on indices
• •Create performance dashboards
• •Generate variance analysis reports
• •Produce management reserve tracking

Usage

Input Requirements

• •Budget baseline (time-phased BAC)
• •Progress data (percent complete or physical measurement)
• •Actual cost data by period
• •Work Breakdown Structure alignment
• •Optional: Management reserve allocation

Output Deliverables

• •Complete EVM metrics table
• •Performance indices with trends
• •Forecasts (EAC, ETC, VAC)
• •S-curve visualization
• •Variance analysis narrative

Example Use Cases

1. •Monthly Reporting: Calculate all EVM metrics for status reports
2. •Forecasting: Generate EAC using appropriate method
3. •Trend Analysis: Track SPI/CPI trends over time
4. •Corrective Action: Identify and analyze variances

Process Integration

This skill integrates with the following processes:

• •earned-value-management.js
• •budget-development.js
• •portfolio-prioritization.js
• •Status Reporting and Communication Management

Dependencies

• •Financial calculation libraries
• •Time series analysis utilities
• •Visualization libraries
• •Data aggregation algorithms

Related Skills

• •SK-001: Gantt Chart Generator
• •SK-009: NPV/IRR Calculator
• •SK-011: Benefits Tracking Dashboard