Engineering, Procurement & Construction (EPC) projects bring together multiple disciplines working in parallel — often in onshore and offshore Oil & Gas and energy environments. In this context, poorly structured planning doesn’t just cause delay: it creates conflict between fronts, rework and a loss of control over what actually matters.
What Makes EPC Project Planning Different
Unlike single-scope projects, an EPC project needs to synchronize engineering, procurement and construction — each phase with its own deadlines, dependencies and contractual milestones. A delay in delivering an engineering package propagates to procurement and, from there, to construction. Without well-built network logic, these interfaces stay invisible until the delay has already happened.
Master Schedule, WBS and Contractual Milestones
The starting point is a WBS (Work Breakdown Structure) that genuinely reflects the project’s work packages, followed by realistic precedence logic between engineering, procurement and construction. The resulting master schedule needs to clearly expose the contractual milestones — the points where the client (or the contract) requires specific deliverables.
Critical Path and Float: Where to Focus Attention
Not every delayed activity threatens the final deadline. Critical path analysis identifies exactly which activities have no float and therefore any delay in them delays the whole project. It’s on these activities — not all of them — that management should concentrate its tracking effort.
Managing Multidisciplinary Interfaces
In complex onshore and offshore projects, disciplines such as civil, electrical and hydraulic depend on each other at specific points in the schedule. Mapping these interfaces — not just each discipline’s activities in isolation — is what keeps a small delay on one front from becoming a problem for the whole project.
Why Primavera P6 Is the Standard in Complex Oil & Gas Projects
Primavera P6 is widely adopted in EPC and Oil & Gas projects for its ability to handle multiple integrated schedules, thousands of activities, shared resources and supplier schedules consolidated into a single model. That gives project leadership visibility over the whole picture — not just the part each team sees.
At AXIPRA, this way of planning is built on hands-on experience in onshore and offshore Oil & Gas projects, structuring integrated schedules that turn scattered scope into an executable, controllable plan. See how this applies in practice in EPC Planning or talk to AXIPRA about your project.