One of the questions we hear most often is: "I want a feasibility study. Do I need a full study, or is a short report enough?" The answer is not about budget alone; it depends on the question you want answered and the stage your idea has reached. Choosing the wrong level costs you in both directions: a comprehensive study commissioned too early drains money and time on an idea that could have been ruled out in a week, or a preliminary study submitted where in-depth analysis is expected weakens your position.
What is a preliminary study?
A preliminary study, sometimes called an initial study or pre-feasibility study, is a quick, focused assessment that aims to answer a single question: does this idea deserve investment in a detailed study?
It usually relies on:
- Available secondary data from published sources and general sector indicators.
- Rough estimates of investment and operating costs, often expressed as ranges.
- A simplified financial model that gives an initial picture of profitability and the payback period.
- A clear identification of the major risks and the assumptions on which the project's success depends.
What do its outputs usually include?
- A brief description of the idea, the target market and the main competitors.
- An initial estimate of investment size and operating costs, within ranges.
- Approximate financial indicators such as the payback period and the break-even point.
- A list of critical assumptions and major risks.
- A clear recommendation: stop, modify, or move on to a detailed study, specifying what needs to be verified.
Its real value is that it acts as a filter: it screens out weak ideas early at limited cost, or compares several alternatives to pick the best one for deeper study.
What is a comprehensive study?
A comprehensive or detailed study is an integrated analysis on which the actual investment decision or financing application is based. It covers every aspect of the project in depth, as we detailed in our guide to economic feasibility studies in the Sultanate of Oman, and is distinguished by the following:
- In-depth market research, often including a field survey and interviews with customers and suppliers.
- A detailed technical study of the site, capacity, equipment and organisational structure.
- Actual price quotations or documented cost estimates instead of rough ranges.
- An integrated financial model with projected financial statements over several years and a financing and repayment schedule.
- Sensitivity analysis, multiple scenarios and a risk management plan.
- A final recommendation that can be defended before funders, partners and boards of directors.
A direct comparison of the two levels
| Criterion | Preliminary study | Comprehensive study |
|---|---|---|
| Objective | Screen the idea and determine whether it merits deeper study | Support the investment decision or financing application |
| Data sources | Mostly secondary | Secondary plus primary field data |
| Cost accuracy | Estimates and ranges | Documented with quotations and comparisons |
| Financial model | Simplified | Integrated, with financial statements and financing |
| Risk analysis | Identification of major risks | Sensitivity, scenarios and mitigation plans |
| Duration and cost | Relatively lower | Higher, depending on scope |
| Audience | The investor or their team | Banks, funds, partners and boards |
When to choose each level
When is a preliminary study enough?
A preliminary study is the smarter choice in situations such as:
- The idea is still at an early stage and you have not yet committed to a site, a partner or an amount.
- You are comparing several ideas and want to know which one is worth investing in a study.
- The project is small and self-funded, and the risk of getting it wrong is relatively limited.
- You need a quick internal decision, for example when management asks for an initial view before allocating a budget.
- You want to test one critical assumption before anything else, such as whether there is sufficient demand in a particular area.
In these cases, the question the preliminary study answers is "Do we stop or go deeper?", not "Exactly how much will we earn?". So do not ask it for a level of precision it was not designed to provide, and do not base major financial commitments on it.
When does a comprehensive study become essential?
- You will apply for financing from a bank, fund or support agency, as these institutions usually require detailed analysis, projected financial statements and a clear repayment capacity. See our article on bank financing requirements.
- The investment is large enough that an estimation error would be costly or hard to reverse.
- Partners or shareholders are joining you and need a shared, transparent basis for evaluation.
- The project is technically complex, such as factories, tourism facilities and multi-phase real estate projects.
- The owner is an institution, such as waqf and charitable bodies whose boards need the decision and its rationale documented.
A hypothetical example for illustration
An investor is considering three ideas: a specialty restaurant, a training centre and a small water bottling unit. If he commissioned a comprehensive study for each idea at a hypothetical cost of OMR 4,000 per study, he would pay OMR 12,000 before knowing which one is worthwhile.
The alternative is to start with three preliminary studies at a hypothetical cost of OMR 1,200 each, i.e. OMR 3,600. The studies reveal that the restaurant faces intense competition at the proposed site and that the bottling unit requires more investment than he can afford, while the training centre looks promising, provided the volume of institutional demand is verified. The investor then moves to a comprehensive study for the training centre alone, bringing his total spend to OMR 7,600, with a clearer decision and in less time, and the comprehensive study builds on the preliminary findings rather than starting from scratch.
More important than the financial saving is that the investor did not fall into the trap of becoming emotionally attached to a single idea before comparing it with the alternatives. Many struggling projects began with a decision already made, and the study then came to justify it rather than test it.
How to choose: questions that settle it
Before contracting for any study, set aside a little time to define what you actually need; this saves you and the study's author rounds of revisions later. Ask yourself these questions:
- Who will read the study? You alone, a funder, or a board of directors?
- What decision will you make based on it? Exploration, or an actual financial commitment?
- How much would you lose if you got it wrong? And can you easily back out?
- Have you settled the site, size and partners? Or are the options still open?
- Which assumption, if proven wrong, would bring the project down? And can it be tested at a preliminary level first?
If your answers lean towards exploration and flexibility, start with a preliminary study; if they lean towards commitment, financing and external parties, a comprehensive study is the better fit. If the answers are mixed, for example you have settled the site but are unsure about the volume of demand, the solution may be a preliminary study focused specifically on that assumption, followed by a comprehensive study if the result is reassuring. Discuss this openly with whoever will prepare the study: a good adviser helps you define the right scope, not expand it unnecessarily.
Beware the wrong "compromise"
Some investors commission a low-cost preliminary study and then expect it to serve as a comprehensive one before a bank or partner. This puts both sides in a difficult position: a study not designed for this purpose is judged against standards it was not built on. The safer course is to have the study's scope clearly written from the start: what it will cover, the expected level of precision, and to whom it will be submitted.
Nor does a preliminary study mean a superficial one; it is concise in scope, not in quality of thinking, and its assumptions must be disclosed and its major risks clearly identified. Conversely, a comprehensive study is not simply a longer study; adding pages of general data without analysis does not make a study comprehensive. The measure of comprehensiveness is the depth with which critical assumptions are verified, the quality of the financial model, and the rigour with which risks are tested, as we explain in our article on sensitivity and scenario analysis.
Conclusion
A preliminary study is a quick filter that protects you from investing in a study of an idea that does not merit it, while a comprehensive study is a solid foundation for committing funds, applying for financing and bringing others on board. The right choice between them starts with two questions: who will read the study, and what will you lose if you get it wrong? In many cases the optimal path is a staged one: a preliminary study first, then a comprehensive study for the idea that passes the test. If you are not sure which level suits your project, we would be glad to help you define the right scope: request your study.
Frequently asked questions
Can a preliminary study be expanded into a comprehensive one later?
Yes, and this is the natural path for many projects. A good preliminary study identifies the critical assumptions that need deeper work, so the comprehensive study picks up where it left off rather than starting from scratch.
Do banks accept a preliminary study for a financing application?
That depends on the funder's policy, the size of the financing and the nature of the project. In most cases, substantial financing applications require a detailed study with an integrated financial model, so it is advisable to ask the funder about its requirements before choosing the level of study.
What determines the cost of a feasibility study?
Cost is determined mainly by the scope of work: the depth of the market research and the need for a field survey, the complexity of the technical aspects, the number of scenarios required, and the party to which the study will be submitted. That is why sound pricing starts with defining the scope, not with a fixed price.
