How do low bids affect work sequencing in Berbera?

A low bid in Berbera often leaves out the supervision and planning hours that keep trades in order, so work sequencing underbidding risks show up later as clashing trades and rework. The tender price rarely reflects a cheaper method; it reflects fewer people on site to plan and check the order of work.

How does a cheap bid push the work sequence out of order?

A bidder who trims supervision hours has nobody tracking which trade should follow which. General practice is that one competent person holds the programme and signs off each stage before the next trade starts. When that role is thin or shared with three other jobs, the mason, the electrician and the plumber can all arrive on the same day.

In Berbera the coastal heat and salt air make open excavations and unfinished concrete more vulnerable, so the gap between trades matters. Ask the bidder to list the supervision hours per week and the name of the person holding the programme. If the answer is "the foreman also handles procurement", the sequence has no owner.

Which omissions cause avoidable trade clashes in Berbera?

Omitted costs usually sit in the interfaces, not the main trades. Look for these gaps in the priced schedule:

• Setting out and level checks after each trade, not just once at the start.
• Hold points where the engineer inspects before the next trade covers the work.
• Protection of finished work while another trade passes through.
• Time for curing before backfilling or loading.
• Rework allowance when the sequence slips.

The mechanism is simple. A bidder removes the item, wins on price, then absorbs the cost by skipping the check or rushing the next trade. Ask the estimator to show where each interface cost sits in the schedule. If it is not there, treat it as a variation waiting to happen. Confirm any inspection requirement with the municipal engineer's office and the project specification before award.

How do you detect the gap before you award the contract?

Read the programme, not the price. Ask every bidder for the same three documents: a trade sequence with dates, a supervision plan with hours, and a list of hold points where work stops for inspection.

Then walk a recent site the bidder finished. Ask the supervisor how they handled a trade clash and who decided the order. Check whether the programme on the wall matches what actually happened. Ask two suppliers or subcontractors for written statements on how they were sequenced on that job.

A realistic bid names the person who holds the programme, the checks between trades and the time allowed for each. A bid that only lists materials and labour has priced the work, not the order of the work. Compare bids on the programme and supervision plan, not on the total alone.

What to do next

Before award, send every bidder a written request for the trade sequence, supervision hours and hold points, and set a deadline. Then walk one recent site per bidder with the proposed supervisor and ask how the last clash was resolved. If the programme does not match the site, price the missing supervision and planning into your comparison before you sign. Check what your contract allows before you adjust anything.