Construction
Run the subcontract and the programme as one
A late approval can delay installation, a missed notice can affect entitlement, and payment, retention and defects must remain tied to the source agreement.
The agreement and rules behind the work
NSW Security of Payment rules and the accepted subcontract
Illustrative engagement
Mechanical services on a live hospital extension
A head contractor appoints a mechanical subcontractor for design, installation and commissioning while the surrounding hospital remains operational.
- Agreement
- Amended AS 4901 style subcontract with design responsibility
- Money
- Monthly claims, superintendent certification, stated GST basis and capped retention
- Time
- Access, approvals, notices, extensions of time and completion dependencies
- Closeout
- Commissioning evidence, manuals, defects and retention release
Product specimen
Nebula workspace
Engagement
Mechanical services on a live hospital extension
NSW Security of Payment rules and the accepted subcontract2 approvals need attention.
ReviewWhere it stands
Installation is active
3 of 6 hold points clearedWhat needs you
2 decisions
Design approval and plant room accessWho is involved
Engagement performance
Current delivery positionDelivery items
Current mechanical services deliveryMechanical design release
VerifiedPlant room access
Needs actionCommissioning evidence
ActiveThe engagement lifecycle
How the engagement moves through delivery
01
Form
Review the working plan
The parties upload the subcontract, scope, programme and annexures. Nebula draws claim, notice, retention, completion and defect requirements into a proposed delivery plan. Each party reviews the responsibilities attributed to it, and accepted decisions stay linked to their source.
What stays connected
Source requirement, responsible party, due date, consequence and review state.
02
Mobilise
Expose what installation depends on
Design submissions, approvals, site access and predecessor work are connected to installation and commissioning. A late response shows the work and dates it may affect.
What stays connected
Critical path, approval owner, answer deadline and downstream exposure.
03
Deliver
Keep progress and payment together
The subcontractor submits a claim with delivery evidence. Claimed progress remains labelled as claimed until the other party assesses it. Certification, GST basis, retention and payment due remain connected.
What stays connected
Claim, evidence, independent assessment, retention and budget position.
04
Change
Separate scope change from delay
A concealed service prompts a variation and a separate extension request. Notice timing, evidence, price and programme effects are assessed while the original position remains preserved.
What stays connected
Earlier state, proposed change, decision, revised amount and revised dates.
05
Resolve
Work the issue from the evidence
If entitlement or workmanship is disputed, the parties can see the governing clause, chronology, submissions and responses together. A defect remains open until rectification is verified.
What stays connected
Issue, reasons, evidence, response history and verified resolution.
06
Close
Finish the commercial and delivery record
Test results, manuals and as-built material discharge closeout obligations. Final account, outstanding defects, retention release and defects-period dates remain visible after practical completion.
What stays connected
Accepted deliverables, final money position, remaining duties and closeout evidence.
One connected engagement
What your engagement holds together
Commercial
Claims, certification, stated GST basis, retention, variation and extension response deadlines, and accepted budget changes.
Schedule
Dependencies, critical path, notice dates and accepted extensions of time.
Collaboration
Shared questions, answers, journals, files, notices from defect to suspension, and decision history.
Proof
On Business, eligible deliverable states can be anchored for later verification.
Delivery trust
Make delivery history useful at the next tender
Counterparty-confirmed delivery stays connected to response, payment and rectification records. Organisations can draw on that record for future tenders; NSW reporting and qualification decisions remain with the relevant officers and agencies.
See how record verification worksStart with the documents that define the work
Build the delivery plan and manage the work, or talk to us about a portfolio.