Reading the schedule attached to a quote

Owners read the price carefully and glance at the dates. The schedule is where a contractor has written down their assumptions about weather, sequence, and how many other jobs they are carrying — and those assumptions are worth as much as the number.

Published by the Land Clearing Authority editorial team · Last revised 2026-07-29 · Editorial policy · Corrections

Who this is for

Owners comparing quotes with different proposed durations
Anyone whose project has to finish before something else starts
People whose ground is only workable in part of the year

The short answer

A duration is an estimate of machine hours plus an allowance for interruption. Two contractors quoting very different durations for the same parcel usually differ on one of those two, and it is worth finding out which.

A much shorter schedule can mean better equipment, more machines, more optimism about weather, or a plan to work in conditions you would rather they did not. It is not automatically better.

What matters more than duration is whether the schedule is continuous or interruptible. A crew that starts, leaves for another job, and returns has a longer elapsed time and possibly a lower price, and you should know which arrangement you are buying.

And whether it is a commitment or a forecast. On weather-dependent work almost nothing can be committed, so what you are looking for is honesty about that rather than a firm date nobody can hold.

What changes the answer

How weather-dependent the work is on your ground
Whether anything downstream depends on the finish date
Whether the crew will be continuously on site
How many other jobs the contractor is carrying
Whether the schedule assumes conditions you have not confirmed

What a duration is actually made of

Separate these and a schedule becomes testable rather than a single number to accept or reject.

The components of a proposed duration
Component	What it depends on	What to ask
Machine hours of work	Area, density, and method	What production rate did you assume?
Mobilisation and setup	Distance and equipment	How much of the first day is setup?
Weather allowance	Season and ground	How many lost days are built in?
Crew continuity	Their other commitments	Will you be here every working day?
Sequencing gaps	Whether stages depend on each other	Are there waits between stages?
Contingency	Confidence in the assumptions	What would make this take longer?

Continuous or interruptible, which matters more than duration

This is the distinction owners discover late and could establish in one question.

A continuous schedule means the crew is on your site every working day until finished. It has the shortest elapsed time, the least disruption, and usually the highest price, because the contractor is committing capacity.

An interruptible schedule means your job fits around others. Elapsed time is longer, the site sits part-worked between visits, and the price is often lower because the contractor is filling gaps. On a job where the ground can sit open safely and you are in no hurry, that is a perfectly good trade.

What causes friction is not knowing which you bought. An owner expecting continuity and receiving intermittent visits reasonably feels let down, even where the contractor never promised otherwise.

What a very short schedule might be telling you

Sometimes it means genuinely better equipment or more of it. Sometimes it means something else.

It can mean no weather allowance, so the first wet week puts the project behind. It can mean an intention to work ground when it is too soft, which produces damage you own afterwards. It can mean a production rate that assumes lighter growth than you have. Or it can mean a second machine that is not on the quote.

None of that makes a short schedule wrong. It makes it worth asking what has been assumed, because the answer is either reassuring or highly informative.

Where the schedule meets everything else

A schedule is not an isolated document. Four other things depend on it, and each one is worth checking against it.

The utility locate notice period, which has to be satisfied before the start date
Mark validity, which may expire before a long job finishes
Any approval or notification that has to precede ground disturbance
A following trade’s mobilisation, which depends on the completion condition being met
Your own preparation — moving vehicles, marking, notifying neighbours
Seasonal constraints you have identified for wildlife or ground conditions

The weather clause worth having

On weather-dependent work, the productive arrangement is not a firm date but a clear rule.

Agree who decides the ground is unworkable, what happens to that day, whether any charge applies, and how rescheduling works. Then a lost day is a procedure rather than a negotiation on a wet morning.

Owners with flexibility should say so explicitly. A window offered rather than a date lets a contractor work in better conditions, which produces a better result for you and a more productive day for them.

What a schedule can never be

It cannot be a guarantee on ground and weather nobody controls. A contractor offering an unconditional completion date on weather-dependent work is either taking a risk they have priced or making a promise they cannot keep.

What it can be is an honest statement of assumptions plus an agreed rule for when they fail. That is more useful than a date, and it is what to look for when you are comparing two very different-looking schedules.

What drives the cost

Cost drivers on this kind of project
Driver	Effect
Continuous crew commitment	Reserving capacity costs more than filling gaps
Weather allowance built in	A realistic allowance lengthens the schedule and stabilises it
Number of machines deployed	More equipment shortens elapsed time at a higher day cost
Sequencing waits	Gaps between dependent stages extend elapsed time without adding work
Schedule flexibility offered by the owner	A window rather than a date lets work happen in better conditions

Common mistakes

Comparing durations without asking what each assumed
Treating the shortest schedule as the best one
Not establishing whether the crew will be continuously on site
Booking a start date that does not allow for the locate notice period
Expecting a firm completion date on weather-dependent work

Questions to ask a contractor

What production rate did you assume to arrive at this duration?
How many weather days are built into this schedule?
Will your crew be here every working day, or fitting this around other jobs?
What is the single most likely reason this would take longer?
What happens, and what does it cost, on a day the ground is unworkable?

What to do next

Ask each bidder to separate machine hours from weather allowance
Establish whether each schedule is continuous or interruptible
Check the start date against your locate notice period
Agree a written rule for unworkable days before booking

Questions people actually ask

Should I choose the contractor with the shortest schedule?

Only after understanding why it is short. It may reflect better equipment, and it may reflect no weather allowance or a plan to work ground you would rather they did not.

Can a contractor commit to a completion date?

On weather-dependent work, not reliably, and one who does has either priced the risk or is promising something outside their control. What can be committed is a rule for what happens when conditions stop the work.

Is an interruptible schedule worse?

It is different. Longer elapsed time and a part-worked site, often at a lower price. Where the ground can sit open safely and you are not in a hurry, it is a reasonable trade — provided you know that is what you bought.

What if the job runs well past the schedule?

What recourse exists depends on your agreement and jurisdiction, which this page does not address. Practically, a schedule with stated assumptions makes it possible to establish which assumption failed, and that conversation is far easier than one about a bare date.