Everything is decided before the first shovel hits the ground
The ability to influence a project's cost and value is greatest at the very start of its cycle. ADEOTI SA brings a proven maturation method to project owners, right from the idea.
The life cycle in three stages
Maturation
From the idea to the investment decision and the actual mobilisation of funding. This is the period when choices can still be made.
Delivery
From procurement to acceptance and commissioning of the works, usually over three to seven years.
Operation
Several decades of service: the future operator is involved in the project from identification onwards.
“Time and money invested upfront do not delay the project; they buy, at the lowest price there will ever be, control over everything that follows.”S. Kouyaté, Guide de maturation de grands projets d'infrastructures économiques et sociales, ch. 2
Four phases, five milestones: a decision at every stage
Maturation works like a funnel: many ideas go in, few projects come out, but each one fully proven. At every phase, cost uncertainty narrows.
Identification and scoping
Is the need real, and does the project deserve study?
Project concept note, major risks identified, terms of reference for the pre-feasibility study.
±40–50% cost accuracy · 3–6 months
M1 · Pre-feasibility authorised
Pre-feasibility
Which option should be chosen among the possible solutions?
Routes, sites and technologies compared, initial environmental and social screening, reference option.
±25–30% cost accuracy · 6–12 months
M2 · Reference option chosen
Feasibility
Is the project timely and viable in every dimension?
Outline design, financial and economic analyses, impact assessment, risk analysis.
±15% cost accuracy · 12–24 months
M3 · Investment decision
Structuring and preparation
Is everything ready to commit and build?
Detailed design, tender documents, rights-of-way cleared, financing closed.
±10% cost accuracy · 9–24 months
M4 · Start of works
At every milestone, a real decision
A formal, reasoned act, taken by a designated authority on a standard file, with four possible outcomes: proceed, proceed with conditions, suspend or abandon. M0 admits the idea into the project pipeline; M3, the decision in principle to invest, is the most important of the cycle.
Alongside the institution, from idea to commissioning
Because we know the real costs, timelines and constraints in the field, we help institutions define projects that are sound, properly sized and bankable.
Identification and pre-feasibility: defining the right project
Cost and time estimates drawn from more than thirty years of projects, early identification of risks (land, material deposits, hydrology, access), realistic comparison of options.
Feasibility: proving it can be built
Constructability reviews of alternatives, works phasing, availability of materials from our quarries and plants, geotechnical investigations with our subsidiary FFA.
Structuring: a tender ready to launch
Realistic lots and schedule, clear tender documents and terms of reference, planned site visits, bank pre-financing solutions, in strict compliance with public procurement rules.
Delivery and acceptance: holding cost, time and quality
No start without a work order, no change without a signed amendment, progress measured in recorded quantities, quality hold points, acceptance without major reservations, as-built records handed over.
A decision file in five dimensions
Strategic : the project serves public policy. Economic : it maximises value for society. Commercial : it attracts companies and investors. Financial : it is bankable and sustainable. Managerial : the project owner can deliver.
Our methodological references: Souleymane KOUYATÉ, Guide de maturation de grands projets d'infrastructures économiques et sociales. Préparer, décider, financer, Éditions KOS, Conakry, 2026, ISBN 9798189693304; Souleymane KOUYATÉ, Gagner les marchés publics en Afrique, 2025, ISBN 9786209258169.