In brief
- A bid price only reflects what the estimator counted, so a low total can sit beside a portfolio that does not prove the bidder did the work.
- Attribution means matching each listed project to a named role, a dated document and a person you can call.
- Close the gap by requiring method statements, labour and plant schedules and written records before award, not after.
Contents
A low bid in Borama often comes with a portfolio that lists projects without saying who did what. That is portfolio attribution risk in underbidding: the price looks complete because items were left out, and the portfolio looks strong because roles are vague. Before you compare totals, check whether each past project names the bidder's actual role, the dates and the person who supervised it.
What does portfolio attribution mean in a Borama tender?
Attribution means linking a claimed project to a specific scope, a specific role and evidence you can verify. A bidder may list a school, a mosque or a water tank and still have supplied only labour, only materials, or only a subcontracted portion. Ask for the contract or purchase order, the completion date, the client contact and the scope of works the bidder signed for. Ask the bidder to supply verifiable evidence of that role, such as a signed letter from the client, a payment record or a dated site photograph, and confirm with the client which evidence it will stand behind. Ask the municipal engineer's office whether it holds any permit or inspection record for the named project. If the bidder cannot name a supervisor, a foreman or a machine that was on that site, treat the entry as unproven and price the risk into your comparison.
How do low bids hide omitted costs and unclear past roles?
Underbidding usually comes from missing items rather than cheaper work. Common omissions include excavation and backfill, formwork reuse assumptions, curing water, compaction in layers, temporary works, supervision time and transport to a site away from the sealed road. When the same bidder's portfolio shows no project of similar size, those omissions go unchallenged, because no past job proves the team has priced that work before. Compare each priced item against a method statement that says how the work will be done, with what plant, in what sequence and over how many days. Ask for a labour schedule and a plant schedule. A bid that carries no supervision line and no testing line is a warning, not a bargain.
How do you detect the gap before award?
Set a short verification stage before you sign. Request the portfolio in a fixed format: project name, location, client, contract value band, the bidder's role, start and completion dates, and the name of the site supervisor. Then test three entries. Call the client. Walk a recent site and look at the workmanship and how the site is run. Ask for test records, concrete cube results or compaction records if the claim involves structural or road work. Check what your tender documents allow you to request, and confirm with your engineer what counts as acceptable evidence. If two suppliers quote for the same missing item, you get a figure you can use in the comparison.
What to do next
Rewrite your tender enquiry to require an attributed portfolio, a method statement and labour and plant schedules with every bid. State in the enquiry that missing items will be treated as excluded scope, not as savings. Send it to at least three bidders, then verify the top two entries by phone and one site visit before you compare prices.
Frequently asked questions
What is portfolio attribution in a construction bid?
It is the link between a listed project and the exact role the bidder played on it, backed by a contract, a client contact and a named supervisor.
Can a low bidder still have a strong portfolio?
Yes. A bidder with real experience can still omit costs from a tender. The portfolio and the priced bill answer different questions, so check both.
Local reporting: this article is written for building work in Borama and Somaliland. Ground conditions, prices and rules differ between places; confirm the details for your own site.