How do you check provisional sums in Berbera?

Provisional sums in Berbera start with arithmetic nobody has tested. A provisional sum is an allowance for work not yet defined, so the tender price can look complete while that part of the scope carries no priced commitment. The competency question is narrow: can this bidder show how the allowance was built, who will price it later, and what evidence sits behind the number?

What leaves a provisional sum unverified in Berbera?

A provisional sum is unverified when the bidder cannot show the build-up behind it. Ask for the allowance split into quantity, rate and source. A lump figure with no quantities behind it tells you nothing about how the work will be measured, ordered or supervised when it starts.

Common gaps that leave the figure untested:

• No quantity take-off, so nobody knows the extent assumed.
• No named rate source, so the basis cannot be traced or updated.
• No method statement for the work itself, which matters for excavation, groundworks and anything below ground level.
• No named supervisor or testing arrangement for the provisional work.
• No schedule of what the sum excludes, so adjacent costs sit in a second unverified figure.

Ask the bidder for the borehole or trial pit logs used for the plot, and ask the municipal engineer's office whether it holds any for the area. If those records do not exist, say so in the tender and require the bidder to state the assumption instead of hiding it inside a single number.

How does unverified capability create misleading budget certainty?

A provisional sum often looks like a fixed price once it sits in the totals, which creates misleading budget certainty. The client compares bids on a figure that no supplier has quoted, so the lowest total can win on the least defined part of the job.

Three mechanisms follow. First, scope drift: the provisional work is defined later by whoever is on site, and the measurement basis shifts with it. Second, the allowance is set low to keep the tender competitive, and the shortfall appears when the actual work is priced. Third, no one has confirmed the bidder can do the work, so supervision, plant or testing gets improvised after the award.

The check is documentary. Ask each bidder for a build-up of the provisional sum, a written statement of what it assumes, and one recent comparable job with the client contact still active. Walk that site and look at the finished work and the records, not the presentation. Confirm how the rate will be set later by asking what your contract says about valuation, and check that clause with your own adviser before you sign.

What should a client ask before signing in Berbera?

Before signing, fix four things in writing: how the sum is defined, how it will be priced, who approves it, and what evidence the bidder must produce.

Ask these questions in the tender return:

• What quantity and rate make up the allowance, and what is the source of each rate?
• What does the sum exclude, and which other sums cover those items?
• Who prices the work when it is defined, using whose measurement and which rates?
• What test records, method statement and supervision arrangement will apply?
• Which recent project of similar scope can be visited?

Where a bidder cannot answer, the gap is the answer. Mark the sum as unverified in your evaluation and price the uncertainty, rather than accepting the lowest total. General practice, not a local rule: confirm every requirement against the project specification and your own engineer.

What to do next

Write one page for the tender file listing each provisional sum, its build-up, the named rate source and the evidence required. Send it to every bidder as a clarification and set a date for written answers. Then walk one recent site from the strongest bidder before you sign. If the sums still have no build-up, price that risk into your decision.