Read Job → Detect Parts Need → Create Parts Task → Track Approval → Track ETA
Parts and Materials Blocker Agent
Identifies which jobs depend on a part, creates the parts task, and tracks approval and ETA, so a work order never sits silently waiting on a part nobody ordered.
The Problem
The job stalls on a part. Nobody knew until the tech arrived.
Tickets silently stall because nobody ordered the part. Turns miss targets. Completions get delayed.
What Changes
Parts-dependent jobs flagged, ordered, and tracked to ETA.
Identifies parts-dependent jobs, creates the parts request, tracks approval and ETA. The ticket shows exactly what it's waiting for and when it's expected.
Humans stay in control: Your team approves and orders parts. The agent flags the dependency and tracks it. It removes the silent stall, not the purchasing.
HOW THE AGENT WORKS
TRIGGERLLMAPIDECISIONACTIONWAIT
TRIGGERJob ScopedA work order or scope is ready
LLMDetect Parts NeedIdentify parts the job depends on
DECISIONParts Needed?
APICreate Parts TaskOpen a parts order task
WAITTrack Approval & ETA
DECISIONParts In?
ACTIONRelease JobMark the job ready once parts land
The agent doesn't buy the parts. Your team approves the order. The agent spots the dependency early and tracks it so the job doesn't stall silently.
HOW TO BUILD IT
Three levels of depth. Pick the one that matches where you are.
For the ops person who needs to understand what's involved and brief their team.
Your JobsScoped work orders
The AgentWorkflow engine + LLM
Your PartsOrdered, tracked, ETA
WHAT YOUR TEAM PROVIDES ONCE
- Parts catalogue - common parts and lead times
- Approval rule - what part cost needs sign-off
- Supplier info - where parts are ordered and typical ETA
- Job dependency rule - which jobs cannot start without parts
- Hold policy - how a job is held while parts are pending
What happens day-to-day: A job gets scoped that needs a part. Instead of a tech showing up and discovering it, the agent flags the dependency, opens the parts task, and tracks it to arrival. The job only releases for dispatch once the part is actually in.
For the IT person or technical lead who needs to scope the integration.
INQUIRY SOURCES
Work order / scope
Inspection feed
Inventory
WORKFLOW ENGINE (N8N)
Trigger
LLM - Detect parts
Branch - needed?
API - Create parts task
Wait - approval + ETA
Branch - parts in?
Release job
CONNECTS TO
PMS / CMMS (Yardi / Property Meld)Read: jobs. Write: parts hold, release
Inventory / procurementRead: stock, lead times. Write: parts task
Supplier / orderingTrack order status and ETA
Notifications (Slack / email)Approval requests, ETA updates
WITHOUT PMS API
Agent flags parts needs from the scope text and tracks orders on a sheet. The dependency logic still runs.
WITH PMS API
Agent reads scopes live, opens parts tasks, and gates job release on real arrival. Best experience.
For the person who wants to build this agent step by step. Each node below maps to an n8n workflow node.
TRIGGERNode 1
Trigger - Job Scoped
Fires when a WO/scope is created (e.g. from Inspection-to-Scope).
Output: { wo_id, scope_text, unit_id }
LLMNode 2
LLM - Detect Parts Need
Identify parts the job depends on and whether they are likely in stock.
Output: [{ part, qty, likely_in_stock, est_lead_days }]
You identify parts a maintenance job depends on.
From the scope and the PARTS CATALOGUE, return the parts required:
- part, qty
- likely_in_stock: true/false best guess
- est_lead_days: from the catalogue if not stocked
If no special parts are needed, return an empty array.
Respond ONLY with a valid JSON array.
PARTS CATALOGUE: {parts_catalogue}
SCOPE: {scope_text}INPUT
"Replace garbage disposal unit, 3/4 HP, in unit 214 kitchen."
OUTPUT
[
{ "part": "3/4 HP garbage disposal", "qty": 1, "likely_in_stock": false, "est_lead_days": 2 }
]DECISIONNode 3
Condition - Parts Needed?
IF parts required and not in stock → create a parts task and hold the job. ELSE → release the job normally.
Output: Branch: PARTS (task + hold) or NONE (release)
APINode 4
HTTP Request - Create Parts Task
Open a parts order task with cost and supplier; if cost exceeds the rule, route for approval first.
Output: Parts task opened; approval requested if needed.
WAITNode 5
Wait & Check - Approval & ETA
Track approval and order status; update the held job with the current ETA.
Output: Job carries a live parts ETA instead of a silent stall.
DECISIONNode 6
Condition - Parts In?
IF parts received → release the job for dispatch. ELSE → keep holding with updated ETA.
Output: Branch: IN (release) or PENDING (hold)
ACTIONNode 7
Release Job
Clear the parts hold and mark the job ready to dispatch, notifying the coordinator.
Output: Job released the moment parts land.
MVP vs Advanced — Where To Start
MVP — START HERE
- Scope-text trigger
- Parts detection vs catalogue
- Parts task to a sheet
- Manual approval
- Manual ETA update
- Email release
ADVANCED — ADD LATER
Full Video Walkthrough Coming Soon
From a parts-dependent job to a tracked ETA - step by step.
Register to be notifiedEverything on this page is free to learn.
When you're ready to build — do it yourself or bring us in.
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Frequently asked questions
Parts and Materials Blocker Agent is an AI agent that tracks parts-dependent jobs so tickets don't silently stall.
The job stalls on a part. Nobody knew until the tech arrived. The Parts and Materials Blocker Agent addresses this — it tracks parts-dependent jobs so tickets don't silently stall.
No — your team stays in control. Your team approves and orders parts. The agent flags the dependency and tracks it. It removes the silent stall, not the purchasing.
This is 4 of 8 agents in Maintenance & Facilities. → · Explore all 10 departments →