On a Tuesday, the cost report arrived with an estimate of the structural option that had been used as the basis for pricing before that option was changed on Thursday of the previous week.
This is typical of complex construction projects.
Historic cost estimating practices and processes are chronically behind the design decision-making process because of the way they are structured. Cost estimators (quantity surveyors) need design documents to prepare cost estimates, while the designs themselves change continually throughout the project lifecycle. By the time the cost report reaches the project team, the design information documented in the report is often no longer accurate.
The gap between design and construction stages is not only administratively inconvenient but can also have a significant financial impact. A peer-reviewed study by Karan Das, Salman Khursheed, and Virendra Kumar Paul, published in Discover Materials (Springer Nature, 2025), found that when all phases of construction utilise a coordinated implementation of Building Information Modelling (BIM), overall construction costs and project delivery time can both be reduced. These outcomes are not simply the result of better software. Rather, they stem from the availability of design and cost information at the same time, allowing all stakeholders to make informed decisions while changes can still be made. The purpose of 5D BIM is to enable exactly that.
How 5D BIM Works in Practice
The dimensions in BIM are layered upon one another.
The Geometric Model
Represents the building elements used to create constructible components.
The Construction Programme
Connects the model to the schedule, showing when each element gets built and how the project progresses over time.
Live Cost Information
Adds cost to every item in the model. Every component carries an associated cost that updates as the design evolves.
For example, if a structural engineer changes the design from a steel frame to a concrete frame, the cost implications are reflected immediately rather than appearing three weeks later in a revised report. The entire project team can see the financial impact during the meeting where the decision is being discussed, before the change is formally approved.
Research on large-scale infrastructure projects has shown that 5D BIM improves financial decision-making by linking cost information directly to live design and scheduling data. This principle applies across a wide range of project types, not just rail infrastructure.
Traditional Cost Management’s Inability to Handle Complex Projects
One of the most common criticisms of traditional quantity surveying (QS) reporting is its speed. While that criticism is valid, the real issue is deeper than speed alone.
The problem is structural. Cost control that operates separately from design control will always provide feedback after decisions have already been made, rather than informing those decisions before they occur.
On hospital projects involving more than 40 interacting disciplines, or mixed-use towers that undergo dozens of design iterations before structural sign-off, the cost implications of design decisions accumulate continuously. Yet many organisations still rely on periodic reporting cycles before communicating those impacts to the wider team.
As a result, by the time the cost plan is presented, the design team is often defending decisions that were made without full financial visibility.
Industry studies suggest that construction rework accounts for anywhere between 2% and 20% of total project value. Research from PlanRadar (2025) indicates that rework can exceed 11% of overall project costs. A significant portion of this occurs because decisions are made without complete information — delayed visibility of cost impacts falls directly into that category.
Counter Perspective: An Outcome-Based Argument
Teams already using cost management software may wonder how 5D BIM differs from the tools they currently employ. The distinction is not necessarily software capability but integration.
Most cost management platforms rely on exported data to generate estimates. Quantity information is extracted from the project model, transferred into a separate pricing system, and then used to generate reports.
Every export creates a snapshot in time. Every import introduces a degree of delay. As soon as the transfer occurs, the information begins to age.
5D BIM embeds the cost relationship directly within the model itself, eliminating the dependency on disconnected snapshots. Cost information remains linked to the live design environment and updates as the design changes.
Projects characterised by high levels of design change, multidisciplinary coordination, and rapid decision-making cycles are likely to benefit the most from this approach. However, projects with lower complexity and fewer design changes may not generate a sufficient return on investment to justify implementation costs.
Construction Programmes in the MENA Region
Across the United Arab Emirates, Saudi Arabia, and Qatar, numerous large-scale construction programmes are currently underway. Many of these developments are gigaprojects featuring highly complex multidisciplinary systems, multiple design teams, aggressive delivery schedules, and clients who expect cost reporting to reflect real-time project conditions.
Whether 5D BIM becomes standard practice across mid-tier projects in the region remains uncertain. What is clear, however, is that the cost of software adoption and workflow integration continues to decrease rapidly. As project complexity increases and decision-making cycles accelerate, the value of real-time cost visibility becomes increasingly difficult to ignore.
Working With Prodigy
Give Your Team Cost Visibility Before Decisions Get Made, Not After
Prodigy Engineering Consultants integrates 5D cost coordination with BIM and MEP design across the UAE, Saudi Arabia, Qatar, and the wider MENA region, helping project teams see financial impact at the point of decision.