UNLISTED WORKFLOW PROTOTYPEUNOFFICIAL · FICTIONAL JOB DATA · ANYONE WITH THE LINK CAN VIEW
SGScopeGuardEXTRA-WORK APPROVAL RECORD
DEMO RECORDSG-0719-DEMOBROWSER STATE ONLY

PREPARED FOR PRO DRAINAGE / CHECKED 18 AUG 2026

Change work only when the record agrees.

Prevent disputed additional work from becoming a refund, complaint or invoice mismatch.

A synthetic, clickable explanation of one narrow protection: when an engineer finds work outside the agreed scope, stop, show the evidence and price consequence, then record the customer's choice.

01 / EvidenceWhat we observed

One January 2026 company response acknowledged that further work should not have proceeded without explicit authorisation.

One isolated public exception; not a claim about normal service or current internal systems.
02 / PrototypeWhat we built

A fictional browser demo of agreed scope → new evidence → customer yes or no → matching invoice limit.

It is not connected to Pro Drainage and makes no technical, pricing or legal decision.
03 / Possible valueWhat it could prevent

Unclear approval for added work, a later dispute about the maximum price, or an invoice line with no matching decision.

These are outcomes to test in discovery, not measured claims about Pro Drainage.
Five short steps · fictional data · no message, approval, invoice or payment is submitted
TodayOne public exception shows where authorisation can become unclear as work expands.
GuardrailA simple check pauses added work until evidence, price and a clear yes or no are recorded.
ResultThe customer and office keep the same decision, and the invoice limit follows it.
JOBKitchen branch flow restriction
VISIT19 Jul · 08:30
ENGINEERDemo technician 04
STATUSpending
01AUTHORISED

INITIAL SCOPE / CUSTOMER COPY

Jet and inspect accessible kitchen branch

  • IncludedWater jetting and camera inspection
  • MaximumUp to £240 inc. VAT — illustrative
  • ExcludedExcavation, pipe replacement, reinstatement
Authorisation ref.DEMO-AUTH-00108:42
02OBSERVED

ENGINEER FIELD NOTE

Condition extends beyond the authorised task

During inspection, the camera could not pass a deformed section beyond the accessible branch. Further exposure is outside the original scope. Work is paused pending a customer decision.

Observation only — not an AI diagnosis or technical conclusion.

03PROPOSED

CHANGE ORDER CO-0719-01

Expose one metre for manual confirmation

AWAITING DECISION
Reason

Access is required to confirm the observed condition.

Added work

Lift access area, expose up to 1m, inspect and make safe.

Still excluded

Replacement, final repair and decorative reinstatement.

Maximum added price+ £680Illustrative · inc. VAT

04 / CUSTOMER YES OR NO

Do you authorise this additional work up to £680?

Approving raises the maximum authorised total to £920. Declining keeps the maximum at £240 and records that no extra work may proceed.

DEMO ONLY · NO MESSAGE, CHARGE OR SIGNATURE IS CREATED
BLOCKED
Additional work remains locked.

A recorded decision is required before the workflow can continue.

SHARED HISTORY / VISUAL DEMO

Who agreed to what, and when

The customer and office would see the same chronological record.

CANNOT BE EDITED*
  1. SCOPE-01Initial scope authorised

    Illustrative customer confirmed jetting and inspection with a £240 maximum.

  2. FIELD-02Additional condition recorded

    Engineer paused the workflow and added an evidence placeholder.

  3. CO-03Change order issued

    Maximum added price of £680 presented; no additional work authorised yet.

*Visual simulation only. A production version requires authenticated identities, server timestamps and genuinely append-only storage.

INVOICE TOTAL CHECK / DEMO

The invoice limit follows the recorded choice

Original maximum£240
Approved change£0
Maximum authorised total£240
DECISION MATCHExtra line blocked
No invoice, payment request or accounting entry is created.

SIX PLAIN PILOT CHECKS

What a working production pilot must prove

Each business rule has a visible pass condition — not a subjective design promise.

A1
Original agreement stays visible

Price, included work and exclusions remain available.

A2
Evidence before added work

A change cannot be offered without a reason and evidence.

A3
A clear yes or no

Approve and decline create different, time-stamped records.

A4
No extra work before yes

The added task stays blocked until approval is recorded.

A5
Invoice matches approval

The invoice limit cannot exceed the recorded decision.

A6
The same copy on both sides

Customer and office can retrieve the same record.

WHAT REMAINS HUMAN

What this demo does not decide

  • No AI diagnosis
  • No automatic pricing
  • No legal conclusion
  • No real customer data
  • No live message or invoice