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OpenRCPSP

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Open .rcp File... Ctrl+O Reload Sample (example project.rcp)

Export Charts (PNG / SVG)

Project Network (AON)... Algorithm Summary Timeline... Resource Profile 1... Resource Profile 2... Resource Profile 3... Gantt Chart (Current View)...

Export All Charts as ZIP

Print / Save as PDF... Ctrl+P

Calculate Current Schedule F5 Run All Heuristics Benchmark Compare Two Algorithms... Calculate Network & Resource Metrics Show Project Network (AON)

Undo Activity Edit Ctrl+Z

Early Start Schedule (CPM) Late Start Schedule (CPM)

Constructive Heuristics... Tabu Search Metaheuristic...

STC Robust Buffer Insertion...

Resource: Contiguous Activity Blocks Resource: Skyline Area Profile

Toggle Dark / Light Mode

Tile / Reset Docked Grid (2×3) Alt+T Cascade Windows (classic) Alt+C

Project Network Algorithm Performance Summary Resource Profile 1 Resource Profile 2 Resource Profile 3 Resource Profile 4 / Parameters

Horizontal Gantt Chart Vertical Gantt Chart

About OpenRCPSP...

Scheme

Priority

STC

Buffer % %

Makespan Gap vs CPM

Activities

Critical

CPM lower bound —

Drag & drop an .rcp file here or click to browse

Orientation

Sort

Critical only

Zoom 14px

Scroll or pinch to zoom; drag to pan nodes.

Resource Utilization

Column headers also sort. Edit for what-if (Undo available).

Algorithm Benchmark Timeline

Edit Activity Properties

Duration:

Inflexibility Weight:

Triangular Duration Distribution (STC):

Min (a):

Mode (m):

Max (b):

Constructive Heuristics (Serial / Parallel SGS)

Scheduling Generation Scheme (SGS):

Serial schedules one activity at a time; Parallel advances time and packs all eligible activities.

Priority Rule (Heuristic):

LFT is recommended: it prioritizes activities under latest-finish pressure on the critical path.

Tie-breaking Rule:

Tabu Search Metaheuristic Optimizer

Explores priority permutations via Adjacent Pairwise Interchanges (API) and short-term tabu memory to minimize makespan.

Max Iterations:

Tabu List Tenure:

Neighborhood Type:

Running… 0%

Starting Time Criticality (STC) Robust Scheduling

Inserts proactive safety buffers using inflexibility weights and triangular duration variance (a, m, b).

Buffer Budget (% of schedule makespan):

Duration Uncertainty Model:

About OpenRCPSP

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OpenRCPSP

Resource-Constrained Project Scheduling — educational web edition

Inspired by the original Windows software RESCON (KU Leuven, 2005) — Mario Vanhoucke, Erik Demeulemeester, Willy Herroelen.

Engine capabilities:

Patterson .rcp parser & exporter
CPM forward/backward passes & critical path
Serial & Parallel SGS with 8 priority rules
Tabu Search with Adjacent Pairwise Interchanges
Proactive robust scheduling (STC)
Network & resource metrics: CNC, OS, RF, RC
MDI tiled layout (slide 2×3), horizontal & vertical Gantt