2.1 Pre-Construction Phase Services

Introduction to Pre-Construction Services

The pre-construction phase is a critical period in the lifecycle of any construction project. It bridges the gap between the initial conceptual design and the physical mobilization on site. The primary goal of pre-construction services is to collaboratively develop the project scope, define the budget, establish a realistic schedule, and identify potential risks before any physical work begins. By investing time and resources into this phase, owners and construction managers (CMs) can avoid costly changes, delays, and disputes during the actual construction.

Pre-construction involves a multi-disciplinary team, including the owner, design professionals (architects and engineers), the construction manager, and sometimes key specialty subcontractors. Their collaborative effort ensures that the project is not only aesthetically and functionally sound but also viable from a budget and timeline perspective.

Value Engineering (VE)

Value Engineering (VE) is one of the most vital processes in pre-construction. It is a systematic, organized approach to providing necessary functions in a project at the lowest cost. VE promotes the substitution of materials and methods with less expensive alternatives, without sacrificing functionality, quality, or reliability.

The Value Engineering Process

The VE process typically follows a standard job plan, which includes the following phases:

1. Information Phase: The team gathers all project data, including drawings, specifications, constraints, and cost estimates. The goal is to fully understand the project's requirements.
2. Function Analysis Phase: This is the core of VE. The team analyzes the functions of various project components. Functions are typically defined by a verb and a noun (e.g., "support weight," "control temperature").
3. Creative Phase: The team brainstorms alternative ways to achieve the identified functions. No idea is discarded at this stage.
4. Evaluation Phase: The brainstormed ideas are evaluated based on feasibility, cost savings, and impact on quality and schedule.
5. Development Phase: The best alternatives are developed into detailed proposals, including cost comparisons and implementation plans.
6. Presentation Phase: The proposals are presented to the owner and design team for approval.

It is important to distinguish VE from mere "cost-cutting." Cost-cutting usually involves reducing scope or quality to save money, whereas VE maintains or improves function and quality while reducing lifecycle costs.

Constructability Reviews

A Constructability Review is an evaluation of the project design by construction professionals to ensure that the project can be built efficiently, safely, and economically. While designers focus on the final product's function and aesthetics, construction managers focus on how the product will be assembled in the field.

Benefits of Constructability Reviews

• Reduced Change Orders: Identifying design errors, omissions, or clashes before construction prevents expensive rework.
• Improved Schedule: Streamlining construction methods and sequencing can significantly reduce the overall project duration.
• Enhanced Safety: Identifying potential hazards in the design phase allows for mitigation strategies before workers are exposed to them.
• Optimized Site Utilization: Ensuring that the design accommodates practical constraints, such as crane placement and material staging.

Constructability reviews should occur at multiple stages of the design process, typically at the schematic design, design development, and construction document phases. The earlier the review, the easier and less costly it is to implement changes.

Cost Estimating and Budgeting

Accurate cost estimating during pre-construction is essential for securing financing and establishing a baseline for project control. As the design progresses, estimates become more detailed and precise.

Types of Estimates

1. Conceptual/Rough Order of Magnitude (ROM): Prepared during the earliest stages of a project when little design information is available. It is often based on historical data and square footage costs. Accuracy is typically +/- 20% to 30%.
2. Design Development Estimate: Prepared when the design is approximately 50% complete. Major systems (HVAC, structural, electrical) are defined, allowing for more detailed quantification. Accuracy is typically +/- 10% to 15%.
3. Construction Document/Detailed Estimate: Prepared when the design is 100% complete. This estimate involves detailed takeoffs of all materials, labor, and equipment required. It serves as the baseline budget for the project. Accuracy is typically +/- 5%.

During pre-construction, the CM continually updates the estimate and compares it to the owner's budget. If the estimate exceeds the budget, the CM initiates VE or scope reduction exercises to realign the project.

Project Scheduling

Developing a comprehensive project schedule during pre-construction is just as critical as cost estimating. The pre-construction schedule must account for design finalization, permitting, bidding, procurement of long-lead items, and the construction phase itself.

Milestone Scheduling

Early in the process, the CM develops a Milestone Schedule, which identifies major project events, such as:

• Completion of design phases
• Obtaining necessary permits
• Awarding major contracts
• Commencement of construction (Notice to Proceed)
• Substantial completion
• Final completion and occupancy

As the project progresses, the milestone schedule is expanded into a detailed Critical Path Method (CPM) schedule, which sequences all construction activities and identifies the longest path through the project, determining the overall duration.

Risk Management and Mitigation

Pre-construction is the optimal time to identify and mitigate project risks. The CM facilitates risk workshops with the project team to identify potential threats, assess their probability and impact, and develop response strategies.

Common pre-construction risks include:

• Regulatory and Permitting Delays: Proactive engagement with local authorities and clear understanding of zoning laws.
• Unforeseen Site Conditions: Conducting thorough geotechnical and environmental surveys before finalizing the design.
• Market Volatility: Identifying long-lead materials or materials subject to price fluctuations and procuring them early.
• Design Deficiencies: Mitigated through rigorous constructability reviews and clash detection (BIM).

By addressing these issues proactively, the pre-construction phase transforms a conceptual idea into a tangible, executable plan, setting the stage for a smooth transition into physical construction.