Dayworks vs Variation: What Should Be Recorded on Site?

What are dayworks?

Dayworks are records of work, labour, plant, materials, or resources carried out and costed based on actual time and usage.

Dayworks are commonly used when the final scope, duration, or quantity is uncertain at the time the work is instructed. Instead of pricing a fixed lump sum upfront, the contractor records what was actually used.

A dayworks docket will often include:

• date
• project
• work description
• instruction source
• labour hours
• plant hours
• materials used
• subcontractor costs
• notes
• evidence
• supervisor or client sign-off, if required

A useful dayworks record should make it clear what was done, why it was done, who instructed it, and what resources were used.

What is a variation?

A variation is a change to the original scope, specification, sequence, quantity, design, or method of work.

A variation may involve added work, omitted work, changed work, different materials, revised design, access restrictions, resequencing, or a change in site conditions.

A variation record may need to show:

• what changed from the original scope
• who instructed or caused the change
• when the change occurred
• what work was affected
• what labour, plant, or materials were required
• whether the programme was affected
• whether cost was affected
• what evidence supports the change

Some variations may be priced before work starts. Others may need dayworks-style records because the impact is not clear until the work is carried out.

This is general information only and not legal advice. Contract requirements vary, so check the relevant contract before submitting formal notices, dayworks, variations, or claims.

Dayworks vs variation: the practical difference

The simplest difference is this: a variation is about a change to the work, while dayworks are about how work or resources are recorded and costed.

Item — Dayworks — Variation

Main focus — Actual time, labour, plant, and materials used — Change to scope, design, method, sequence, or quantity

Common use — Work instructed without fixed price or final quantity — Change from original contract scope

Site record needed — Daily docket with resources and evidence — Change record with instruction, scope impact, and evidence

Typical evidence — Labour hours, plant hours, materials, notes, sign-off — Instruction, drawing revision, RFI, photos, cost impact, programme impact

Main risk — Resources are not recorded clearly — Change is not linked to an instruction or scope difference

The two often overlap. A variation may be supported by dayworks records if the changed work was performed on a time-and-material basis.

What should be recorded on site for dayworks?

For dayworks, the site record should focus on actual resources used and the reason those resources were required.

Record:

• date of the work
• location on site
• instruction or approval reference
• description of work carried out
• labour names, roles, hours, and rates if required
• plant item, quantity, hours, and rates
• materials used and quantities
• subcontractor or supplier costs
• photos and videos
• delivery dockets or invoices
• supervisor notes
• sign-off, if required by the project process

A weak dayworks docket says:

Extra works completed.

A stronger dayworks docket says:

Additional trench support installed at Chainage 120–145 following site instruction SI-057. Two labourers, one supervisor, one 8t excavator, and timber shoring materials used. Photos, delivery docket, and signed dayworks record attached.

The stronger version gives the commercial team a record they can understand and review.

What should be recorded on site for variations?

For variations, the site record should focus on what changed and how that change affected the work.

Record:

• original scope or planned activity
• changed scope or revised requirement
• instruction source
• date of instruction
• drawing, RFI, email, or site instruction reference
• affected location
• labour impact
• plant impact
• material impact
• subcontractor impact
• programme impact, if relevant
• photos or videos before, during, and after
• any dayworks dockets created
• notes from the supervisor or project manager

A weak variation record says:

Extra work due to design change.

A stronger variation record says:

Revised drainage detail on drawing C-204 Rev C required additional excavation and bedding at Pit 12. Original detail shown on C-204 Rev B. Instruction received by email on 18 June. Work affected one drainage crew, 8t excavator, bedding material, and one additional shift. Photos and dayworks docket attached.

A variation record should make the change traceable. Someone should be able to compare what was planned with what actually had to be done.

Why the instruction source matters

The instruction source matters because it helps show why the work changed or why resources were used.

Useful instruction evidence includes:

• site instructions
• superintendent instructions
• client emails
• head contractor directions
• revised drawings
• RFIs and responses
• design clarifications
• meeting minutes
• marked-up drawings
• verbal instruction notes confirmed by email

Verbal instructions are common on site, but they are risky if not recorded. If work is instructed verbally, the record should note who gave the instruction, when it was given, what was said, and whether it was confirmed later in writing.

Do not rely on memory. A short written note created the same day is much stronger than a reconstructed explanation weeks later.

Common mistakes with dayworks and variations

The most common mistake is doing the work first and trying to build the record later.

Other mistakes include:

• not recording who instructed the work
• using vague descriptions like “extra labour”
• failing to separate labour, plant, and materials
• missing start and finish times
• missing photos before the work was covered up
• not keeping delivery dockets or supplier invoices
• failing to get dayworks signed where required
• not linking dayworks to the variation event
• assuming a site diary note is enough
• failing to check the contract process for notice or approval requirements

Dayworks and variations both become weaker when the site record is incomplete.

Example: dayworks supporting a variation

A subcontractor is instructed to excavate additional material after a revised drawing changes the pit detail.

The variation record should explain:

• the original pit detail
• the revised pit detail
• the drawing revision
• who instructed the change
• where the work occurred
• what extra work was required
• whether the programme was affected

The dayworks docket should record:

• labour hours
• plant hours
• materials used
• time spent
• daily notes
• photos
• dockets
• sign-off

Together, the variation record explains why the change occurred. The dayworks docket explains what resources were used to carry it out.

Dayworks and variation record checklist

Before submitting or relying on a dayworks or variation record, check that it includes:

• [ ] Project name
• [ ] Date
• [ ] Location
• [ ] Description of work or change
• [ ] Original scope or planned work, if relevant
• [ ] Revised scope or instructed work
• [ ] Instruction source
• [ ] Drawing, RFI, email, or site instruction reference
• [ ] Labour details
• [ ] Plant details
• [ ] Materials or fixed costs
• [ ] Start and finish times
• [ ] Photos or videos
• [ ] Delivery dockets, invoices, or rate support
• [ ] Supervisor notes
• [ ] Signature or approval, if required
• [ ] Link to any related delay, EOT, or claim record

A clean record gives the commercial team fewer gaps to chase later.

Use the free Dayworks Docket Generator

Need to create a structured dayworks record? Use the free Dayworks Docket Generator.

DelaySolve’s free Dayworks Docket Generator helps create a record with labour, plant, materials, notes, and delay details in one place. It is useful when work is being recorded on a time-and-material basis and you need a clearer docket before submission or review.

For related guidance, read Dayworks Docket Template: What to Include Before You Submit a Claim or Construction Variation Claim Evidence: What to Keep on Site.

How DelaySolve helps with dayworks and variations

DelaySolve helps turn logged delays into structured dayworks records with labour, plant, materials, notes, and supporting evidence connected to the same event.

For live projects, that means site teams can capture the facts early, while commercial teams have a clearer record to review later.

FAQs

Is dayworks the same as a variation?

No. A variation is usually a change to scope, design, method, sequence, or quantity. Dayworks are a way of recording and costing actual labour, plant, materials, and resources used.

Can dayworks support a variation claim?

Yes. Dayworks records can support a variation when they show the actual labour, plant, materials, and time used to carry out changed or additional work.

What evidence supports a dayworks docket?

Useful evidence includes site instructions, photos, labour hours, plant hours, material dockets, supplier invoices, emails, RFIs, revised drawings, and supervisor notes.

What evidence supports a variation?

Useful evidence includes the original scope, revised drawings, instructions, RFIs, emails, photos, programme impact records, labour records, plant records, material costs, and related dayworks dockets.

Should dayworks be signed daily?

Many projects require dayworks to be signed daily or within a defined process. Check the relevant contract and project procedure before relying on unsigned records.