Feasibility studies are a familiar and necessary part of development and investment decision-making. They provide a structured assessment of market conditions, financial performance and risk, and are often used to support funding, approvals and internal sign-off.
However, while feasibility studies are typically treated as definitive, markets rarely behave that way.
In practice, markets change far more quickly than most feasibility studies anticipate. Understanding this disconnect – and planning for it – is critical to achieving successful outcomes.
The limitations of a static view
A feasibility study is, by its nature, a snapshot in time.
It reflects:
Market conditions at a specific moment
Assumptions based on available data
Forecasts derived from current trends
At the point of completion, it may be technically robust and internally consistent. The challenge arises when it is treated as a fixed reference point rather than a working framework.
Economic conditions, construction costs, demand dynamics, financing structures and regulatory environments can all shift – sometimes materially – between feasibility, commencement and completion.
When this happens, the original study may no longer reflect reality, even if it was sound when prepared.
The myth of certainty
One of the most common pitfalls in development and investment decision-making is the search for certainty.
Feasibility studies can create a sense of confidence by presenting clear outputs: projected returns, timelines, yields and values. These figures are often precise, sometimes down to several decimal places.
Yet precision should not be mistaken for certainty.
Behind every model are assumptions – about pricing, absorption, costs, timing and risk – that are inherently uncertain. When market conditions change, these assumptions can quickly become outdated.
The issue is not that feasibility studies are wrong, but that markets rarely remain static long enough for a single set of assumptions to remain valid throughout a project lifecycle.
Why change is the norm, not the exception
Market change is not an anomaly; it is a constant.
Common sources of change include:
Shifts in demand or buyer behaviour
Changes in supply pipelines
Construction cost inflation
Delays in approvals or delivery
Changes in financing conditions
- Regulatory or policy adjustments
In some cases, change is gradual and manageable. In others, it can be rapid and disruptive.
Projects that struggle are often not those that encounter change, but those that are unable or unwilling to adapt when change occurs.
The role of scenario and sensitivity analysis
One way to address uncertainty is through scenario and sensitivity analysis.
Rather than relying on a single outcome, scenario analysis tests how changes in key assumptions affect performance. Sensitivity analysis helps identify which variables have the greatest impact on results.
Used properly, these tools:
Highlight vulnerabilities within a project
Identify thresholds beyond which viability is compromised
Support more informed decision-making
Provide early warning signals as conditions evolve
However, these analyses are most valuable when revisited over time, not simply included as appendices in an initial report.
Feasibility as a process, not a document
In dynamic markets, feasibility should be viewed as an ongoing process rather than a one-off exercise.
Periodic review allows:
Assumptions to be updated
Market intelligence to be incorporated
Strategies to be adjusted
Risks to be managed proactively
This approach acknowledges that deviation from an original plan is not necessarily a failure. In many cases, it is a rational response to changing conditions.
Projects that perform well over the long term are often those that remain flexible – adjusting product mix, phasing, pricing or delivery strategy as circumstances require.
Best land use is rarely static
Similar principles apply to best land use studies.
While certain uses may appear optimal at a given point in time, changes in demand, demographics or competing supply can alter the balance.
An approach that considers how uses interact and complement each other – rather than maximising a single metric – tends to be more resilient over time.
Revisiting land use assumptions as markets evolve can unlock value that may not have been apparent at the outset.
The cost of not revisiting assumptions
Failure to revisit feasibility assumptions can have tangible consequences.
These may include:
Overcommitting capital to underperforming uses
Missing opportunities to reposition or adapt
Delayed response to market signals
Increased risk of impairment or underperformance
In contrast, projects that actively monitor performance against assumptions are better placed to take corrective action early, when options remain available.
Independent advice supports adaptability
Adaptability requires more than data; it requires judgement.
Independent advisors can play a critical role in challenging assumptions, reassessing strategies and providing objective insight as conditions change.
An independent perspective helps separate sunk cost thinking from forward-looking decision-making, supporting choices based on current and expected conditions rather than historical projections.
A pragmatic view of feasibility
Feasibility studies remain an essential part of development and investment planning. They provide structure, discipline and a framework for decision-making.
The key is recognising their limitations.
Used as static documents, they can constrain thinking. Used as dynamic tools, they can support adaptability, resilience and better outcomes.
A final thought
Markets will always change faster than feasibility studies.
The question is not whether assumptions will be challenged, but how prepared decision-makers are to respond when they are.
Those who treat feasibility as a living process – revisited, tested and adapted over time – are better placed to navigate uncertainty and deliver sustainable value.