What is the Mission of OPC Construction?

In the intricate and dynamic world of construction, the role of Scheduling, Steering, and Coordination (OPC in French, for “Ordonnancement, Pilotage et Coordination”) is often undervalued, yet it is crucial for the success of any engineering project, especially in EPC (Engineering, Procurement, Construction) projects. The OPC is the cornerstone that ensures the various facets of a construction project align smoothly, thus enabling adherence to deadlines, budgets, and quality standards. This role demands not only technical expertise in engineering and project management but also an exceptional ability to communicate effectively among various stakeholders. This article delves into the OPC’s mission in construction, highlighting its undeniable impact on the success of engineering projects and underscoring the key challenges of this role for the success of an EPC project. From meticulous planning to impeccable coordination, the OPC proves to be an essential link, orchestrating collective efforts to turn an architectural vision into a tangible and lasting reality. 

Understanding the OPC in the Context of Construction

A fundamental aspect of the OPC‘s mission, often the starting point of any construction project, is the establishment of all trades schedule. This task involves creating a comprehensive timeline coordinating the work of all trades involved in the project. The pilot must meticulously consider the different interfaces of the site, such as logistics, material supply, and various construction phases, ensuring each trade operates within a timeframe that maximizes efficiency and minimizes conflicts or delays. This initial planning is critical as it sets the pace and structure of the entire project. 

The OPC, an acronym for Scheduling, Steering, and Coordination, plays a vital role in the construction sector. Its central mission is to ensure all aspects of a construction project are seamlessly integrated and executed efficiently. Scheduling involves detailed planning of the work, establishing a precise schedule of activities. This includes defining the different stages of the project, from site preparation to final delivery, including design and construction phases. 

Steering, meanwhile, involves the active management of the project, ensuring all stakeholders – architects, engineers, contractors, suppliers – work together towards common goals. This coordination is essential to keep the project within its budget and timeline. 

Coordination is perhaps the most crucial aspect of the OPC. It involves constant communication among all project stakeholders, resolving conflicts, ensuring adherence to safety and quality standards, and adapting plans to inevitable changes during an engineering project. 

In summary, the OPC in the construction context is not just a project management function but an essential element ensuring each project is conducted orderly, efficiently, and harmoniously, aligning the goals of all involved parties. 

The Main Missions of the OPC

In the field of construction, the OPC is responsible for three main missions: scheduling, steering, and coordination. Each contributes significantly to the management and success of a construction project. 

Scheduling: The first mission of the OPC is scheduling. This step involves creating a detailed calendar describing the sequence and duration of all activities necessary for the project’s realization. The goal is to maximize efficiency by optimizing resource use and minimizing delays. Scheduling requires a deep understanding of every project aspect, from earthworks to finishing, and an ability to anticipate interactions between different tasks. Careful planning at this stage can prevent costly delays and resource conflicts. 

Steering: The second key mission of the OPC is steering, concerning the daily management of the construction site. This includes coordinating work among different trades, managing supplies and equipment, and monitoring progress against the established schedule. Steering requires the ability to make quick and effective decisions in case of deviations or unforeseen issues. The OPC must also ensure that quality standards are met, and that work progresses according to plans and specifications. 

Coordination: The third mission, coordination, is perhaps the most complex. It involves maintaining smooth and effective communication among all project actors: project owners, architects, engineers, contractors, and sometimes even local authorities and residents. This coordination is crucial for quickly resolving issues, adapting plans to changing requirements, and ensuring all stakeholders are aligned with the project’s goals. Effective coordination helps maintain harmony on the site and prevent misunderstandings and delays. 

In summary, the OPC plays a multidimensional role in construction projects, combining strategic planning with active management and effective communication to ensure smooth project progress and success. 

The Impact of the OPC on the Success of a Project

The importance of considering contractual and administrative constraints: Another crucial aspect of the OPC’s role is managing contractual and administrative constraints. It is imperative that the OPC understands and integrates contractual requirements into the project’s planning and management. This includes delivery deadlines, technical specifications, and regulatory and legal obligations. By considering these constraints, the OPC ensures not only adherence to commitments but also prevents potential disputes and penalties that may arise from non-compliance. This sensitivity to contractual and administrative aspects is fundamental to ensuring smooth project progress and client satisfaction. 

Choosing the planning tool and preparing the teams: Selecting the appropriate planning tool is essential for the OPC, especially in contexts were juggling multiple software, such 

as Primavera and Tilos, is necessary. Each tool has its specificities and utility, and the OPC’s mastery of these tools contributes to more precise and efficient planning. Concurrently, the preparation phase is a decisive step. During this period, the OPC must meticulously prepare the teams and facilitate the rapid mobilization of companies. This involves clarifying roles, defining expectations, and establishing communication processes. Adequate preparation ensures that from the project’s start, all stakeholders are aligned and ready to move forward coherently and coordinately. 

The influence of Scheduling, Steering, and Coordination (OPC) on the success of a construction project is both profound and multidimensional. The OPC’s impact extends beyond mere daily task management, significantly influencing the project’s quality, cost, and delivery time.

Quality: The OPC plays a crucial role in maintaining quality standards. Through continuous supervision and effective coordination, the OPC ensures that the works meet technical specifications and client expectations. This constant attention helps prevent costly errors and failures that could compromise the project’s quality and safety. 

Cost: In terms of financial management, the OPC helps keep the project within its planned budget. Through rigorous planning and meticulous tracking of expenditures, the OPC helps avoid cost overruns, often caused by delays or errors in work execution. 

Deadlines: Perhaps the most visible aspect of the OPC’s impact is its influence on adhering to deadlines. By coordinating different teams and effectively managing the project schedule, the OPC plays a determining role in timely project delivery. This time management is essential not only for meeting contractual commitments but also for minimizing additional costs related to delays. 

In conclusion, the OPC is a key element that determines the success of a construction project. Its ability to harmoniously orchestrate the different project aspects is indispensable for achieving quality, cost, and deadline objectives. 

The Challenges and Skills Required for Effective OPC

The effectiveness of an OPC (Scheduling, Steering, Coordination) in the construction field depends on its ability to meet several challenges and master a set of key skills. 

Challenges: One of the main challenges for an OPC is managing the complexity and interdependence of different project phases. It must also deal with unpredictability, such as delays due to external factors (weather conditions, late material deliveries), and manage limited resources effectively. 

Prioritization of critical tasks: An additional and crucial challenge for the OPC is managing and prioritizing critical site tasks. The planner must prioritize these tasks, as they have the potential to significantly impact on the overall project schedule. Identifying and closely monitoring these critical tasks allows anticipating and avoiding any shifts that could lead to delays in the overall execution. This proactive approach is essential for keeping the project on track, thus ensuring deadline adherence and project objectives satisfaction. Effective management of critical tasks reflects a deep understanding of project dynamics and an ability to respond agilely to site developments. 

Skills: To overcome these challenges, an effective OPC must possess excellent project management skills, particularly in planning and organization. A strong ability to communicate and negotiate is crucial for coordinating different participants and resolving conflicts. Moreover, a deep understanding of the technical aspects of construction and an ability to adapt quickly to changes are indispensable. 

In summary, the OPC must combine technical skills, managerial capabilities, and behavioral flexibility to successfully lead a construction project to completion. 


The mission of the OPC in a construction project is of paramount importance. It transcends mere task management to become a complex orchestration of planning, steering, and coordination, essential to the project’s success. The OPC acts as a conductor, harmonizing the efforts of all participants to ensure the project proceeds smoothly, respecting deadlines, budget, and high-quality standards. The challenges faced by the OPC are numerous, but with a well-honed set of skills, combining technical expertise, management capabilities, and effective communication, it can successfully lead even the most complex projects. In the end, the value of a competent OPC cannot be underestimated, as it is the unseen force that transforms plans and visions into concrete and lasting realities. 

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