Digital Field Operations: Our Custom AMC Maintenance Mobile App for On-Site Engineering Teams

Explore our custom AMC Maintenance Field App designed for on-site engineering teams to manage preventive schedules, capture visit logs, track spare parts, and record client sign-offs.

 · 5 min read

Managing Annual Maintenance Contracts (AMCs) across multiple commercial and industrial facilities requires real-time visibility, strict checklist compliance, and seamless communication between field technicians and central operations.

We designed and built a mobile-first AMC Maintenance Field Application tailored for engineering teams servicing critical assets—including HVAC Chillers, Air Handling Units (AHUs), Standby Generators, Fire Protection Systems, and High-Voltage Switchgears. Here is a look at the application's core capabilities and workflow design.


1. Technician Dashboard & Real-Time Daily Schedule

Field engineers start their shift with an instant summary of their daily commitments. The dashboard features high-priority KPI metrics and a time-sorted schedule feed:

  • Glanceable KPIs: Instant view of Today’s Visits, Overdue Tasks, and total Active AMCs.
  • Status-Coded Work Orders: Service tickets clearly tagged as Upcoming, In Progress, or Completed.
  • Quick Action Launcher: 1-tap navigation to open calendars, log new site visits, check contract history, or access project rosters.
Home dashboard
9:30
Wednesday, 22 Jul 2026
Good morning, Rajan
RK
4
Today's visits
1
Overdue
12
Active AMCs
Today's schedule
See all
09:00
Upcoming
Marina Bay Financial Centre
Chiller Plant AMC · Preventive
11:30
In Progress
Changi Business Park
AHU Systems AMC · Corrective
14:00
Upcoming
Jurong Data Centre
Generator Sets AMC · Preventive
16:30
Completed
Paya Lebar Quarter
Fire Protection AMC · Corrective
Quick actions
Calendar
New visit log
AMC projects
Log history
Home
Calendar
Logs
Projects
Profile


2. Calendar-Driven Schedule & Maintenance Visuals

The interactive calendar provides both monthly and weekly grid views, helping operations leads and technicians prevent missed SLAs:

  • Green Indicators (Preventive Maintenance): Color-coded dots for recurring, contract-mandated servicing.
  • Orange Indicators (Corrective Maintenance): Visual tags for emergency site calls and unscheduled repairs.
  • Day-Level Breakdown: Tap any date to reveal scheduled site visits, time slots, asset types, and locations.
Maintenance calendar
9:30
Maintenance Calendar
Month
Week
July 2026
S
M
T
W
T
F
S
28
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
Preventive
Corrective
Wed 22 Jul — 4 visits
09:00 · Marina Bay Financial Centre
Chiller Plant AMC · Preventive
11:30 · Changi Business Park
AHU Systems AMC · Corrective
14:00 · Jurong Data Centre
Generator Sets AMC · Preventive
16:30 · Paya Lebar Quarter
Fire Protection AMC · Corrective


3. Dispatch & Schedule Assignment Module

Dispatch managers can quickly schedule and delegate work directly from the app interface:

  • Assign visits by selecting the specific AMC Contract and Target Asset (e.g., Chiller Unit A - 500RT).
  • Set service types (Preventive vs. Corrective) and establish flexible recurrence rules (e.g., Monthly, repeats on the 22nd).
  • Allocate field technicians using quick-assign avatar chips and attach special site access notes.
Create / assign schedule
9:30
New Schedule
Save
AMC Project
Marina Bay FC — Chiller Plant AMC
Equipment
Chiller Unit A (500RT)
Maintenance type
Preventive
Corrective
Date
22 Jul 2026
Time
09:00 AM
Recurrence
Monthly, repeats on the 22nd
Assign technician
RK
Rajan K.
FA
Farah A.
Notes
Bring replacement air filter…
Cancel
Save Schedule


4. Structured Visit Log & Execution Flow

When arriving on-site, technicians tap "Check In & Start Visit" to initiate a structured digital job sheet:

Visit log history
9:30
Visit Logs
All
Preventive
Corrective
This month
21 Jul 2026
Done
Marina Bay Financial Centre
Chiller Plant · Preventive
RK
Rajan Kumar
18 Jul 2026
Done
Sentosa Cove Substation
Switchgear AMC · Corrective
FA
Farah Aziz
15 Jul 2026
Done
Jurong Data Centre
Generator Sets · Preventive
RK
Rajan Kumar
10 Jul 2026
Done
Changi Business Park
AHU Systems · Preventive
WL
Wei Ming Lee
08 Jul 2026
Done
Paya Lebar Quarter
Fire Protection · Corrective
FA
Farah Aziz
Home
Calendar
Logs
Projects
Profile


5. Parts Logging, Photo Evidence & Customer Sign-Off

To eliminate paper friction and inventory leaks, the app captures all field evidence digitally before ticket submission:

Visit log capture
9:30
Visit Log — Chiller Unit A
Marina Bay Financial Centre
Time in
09:04 AM
Time out
Check out
Checklist
2/5 done
Inspect compressor oil level
Check refrigerant pressure
Clean condenser coils
Test safety interlocks
Verify BMS alarm integration
Parts used
Refrigerant R134a
2 kg
Air filter
1 pc
+ Add part
Photos
Notes
Condenser coils showed light scaling; recommend descaling next visit.
Site sign-off
Tap to sign
David Tan, Facilities Manager
Submit Visit Log


6. AMC Contract Directory & Lifecycle Analytics

Operations managers gain full portfolio oversight across all active maintenance contracts:

AMC project list
9:30
AMC Projects
12
Active contracts
12
Sites covered
Marina Bay Financial Centre — Chiller Plant AMC
Active
Raffles Property Mgmt
68%
Changi Business Park — AHU Systems AMC
Expiring soon
CapitaLand Facilities
81%
Jurong Data Centre — Generator Sets AMC
Active
ST Digital Infra
54%
Paya Lebar Quarter — Fire Protection AMC
Active
Lendlease Asset Mgmt
46%
Sentosa Cove Substation — Switchgear AMC
Active
Sentosa Development Corp
38%
Home
Calendar
Logs
Projects
Profile

📉 The Business Case

AMC maintenance providers lose margin and client trust in the gap between site execution and central contract management. The engineering work on-site is top-tier — but capturing compliance, inspection checklists, and spare parts in real time is where operations break down.

  • Missed SLAs & Overdue Servicing. Without automated schedules, preventive maintenance cycles quietly slip past, triggering contract penalties, equipment downtime, or emergency repair calls.
  • Paperwork & Memory-Based Logs. Paper inspection forms get misplaced, smudged, or filled out retroactively hours later, leaving zero trustworthy audit trail for critical industrial assets.
  • Spare Parts & Inventory Leakage. Consumables like refrigerants, filters, and oils used during visits aren't logged on the spot, turning expensive inventory into unbilled operational losses.
  • Client Sign-Off Disputes. Without immediate photo evidence, precise time-stamps, and verified facility manager sign-offs, "we didn't see your technician today" turns into delayed payments or write-offs.
"Every paper job sheet tucked into a technician's clipboard is a contract risk and an unbilled expense sitting on your books."

🚀 The Business Value

AMC Field Operations Mobile turns chaotic site servicing into a structured, real-time digital compliance system — captured live in the plant room, synced instantly, and fully verifiable.

  • Zero Missed Contract Windows. Interactive calendar schedules with color-coded Preventive vs. Corrective indicators ensure every SLA commitment is met on time.
  • Ironclad Digital Proof of Work. GPS/time-stamped check-ins, mandatory step-by-step checklist validation, and photo attachments give facility owners 100% confidence in your service quality.
  • 100% Material Accountability. Technicians log replacement parts and consumables (like R134a refrigerant or replacement filters) directly against the equipment ticket before leaving the site.
  • Instant On-Screen Sign-Off. Compress billing cycles from weeks to seconds with digital customer signature capture directly on the phone screen.
  • Total Portfolio Visibility. Managers track live contract health, cycle completion rates (e.g., 14/24 visits completed), and upcoming expiration warnings across all active sites at a single glance.

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