Pre Bid EOI Document for Selection of consortium partner for SITC, Operation and Maintenance of Surveillance System in Ahmedabad City Safe and Secure Ahmedabad SASA II

Pre-Bid EOI for Selection of consortium partner for SITC, Operation and Maintenance of Surveillance System in Ahmedabad City Safe and Secure Ahmedabad (SASA II)” (EOI No:TCIL/ITT1/125/2026 dated 21/04/2026)

Bidder Name 1223

GRAND TOTAL - PROJECT SUMMARY

Item Component Total (₹) INR Without GST Total (₹) INR with GST

CA CAPEX (A+B+C+D+E)

OP OPEX (1 Year) (F+G+H+I+J+K)

Final OPEX (5 Years)(OP*5)

GRAND TOTAL (A+C)

Note for Financial Bid: 1. All line items must comply with technical specifications and Scope of Work, including all applicable licenses, active/passive cabling, accessories, installation, commissioning, configuration, AMC, warranty, and back-to-back OEM support for the entire contract duration. 2. Quantities in the tables are indicative and used for commercial evaluation. SCADL will issue orders based on actual requirements at the time of placing the order. 3. Actual bandwidth quantities may vary based on field survey. SCADL will issue a work order to the TSP after the bidder completes the survey and confirms bandwidth requirements. 4. Quantities mentioned are based on current assessment. At implementation, actual quantities will be considered. Payment will be made based on executed quantities at quoted rates. 5. SCADL reserve the right to delete any product/equipment before final implementation and remove any BOQ line item. 6. Bandwidth rates shall be reduced proportionately if TRAI revises prevailing rates during the contract period. 7. Bidder must upload a detailed priced BOQ online. No field should be left blank. 8. All out-of-pocket expenses (boarding, lodging, travel, etc.) must be included in the quoted price. No separate payment will be made. 9. Refer to the quantity variation clause in Section 13.25 of client RFP. 10. Rates for dismantling and reinstallation shall remain valid for the entire contract duration. Quantities are indicative; bidder must perform additional dismantling/reinstallation at the same quoted rate. Cost must include all allied activities; no extra payment will be made. 11. Provide breakup of all taxes, duties, and levies wherever required. 12. SCADL reserves the right to request proof of payment for any taxes, duties, or levies indicated. 13. If GST rates change during the project, adjustments will apply as per government norms with supporting documents. 14. Quoted rates may be considered for additional procurement/payment in future. 15. Lump Sum items shall have quantity as one (1) in the BOQ; bidder must quote as a complete package/solution. 16. No additional cost beyond quoted BOQ rates will be paid. Bidder must include all associated costs in their commercial bid. No claims for extra cost will be entertained.

Pre-Bid EOI for Selection of consortium partner for SITC, Operation and Maintenance of Surveillance System in Ahmedabad City Safe and Secure Ahmedabad (SASA II)” (EOI No:TCIL/ITT1/125/2026 dated 21/04/2026)

PART A - CAPEX TABLE

Sr. No. Schedule Item Name Qty Unit Unit price Total Price GST (%) Total Price w/ GST

SCHEDULE A - EDGE DEVICES

1 A1 PTZ Camera Outdoor PTZ 4MP 1622 Nos

2 A1 Fixed Camera (incl. ANPR capable) 2MP 1600 Nos

3 A1 Fixed Camera (incl. ANPR capable) 4MP 744 Nos

4 A2 Camera Pole 6m GI Hot-Dip GI MS 1.5-2.5m Cantilever IS:2629/IS:2713 1500 Nos

5 A2 Camera Pole 8m GI Hot-Dip GI MS 2.5-3.5m Cantilever 250 Nos

6 A2 Camera Pole 10m GI Hot-Dip GI MS 3.5m+ Heavy-Duty Multi-Arm 227 Nos

7 A2 Gantry Structure Multi-Lane Hot-Dip GI 3-6m Span Multi-Camera Mount 88 Nos

8 A2 AMTS Shelter Mounting Bracket -Camera Mounting / Accessories Wall/roof GI bracket for 2 fixed cameras 800 Nos

9 A2 RCC Foundation Excavation + RCC Concreting + Anchor Bolts 1855 Nos

10 A3 Outdoor Field Cabinet CRCA 1.2mm IP66 Rain Canopy + Tamper Sensor, DIN Rail + PDU + Bus Bar + Cable Glands, IP66 CRCA cabinet, (AMC Plot + switch locations) 2655 Nos

11 A4 Industrial L2 PoE Switch 8 PoE + 2 SFP, 240W, Managed IP40 DIN Rail SNMP v3 1155 Nos

12 A4 PoE Injector 30W/60W Outdoor Rated 1500 Nos

13 A4 SFP Module 1G SM 20km 1000Base-LX LC 2344 Nos

14 A4 Media Converter GE to SM 10/100/1000 SC/LC 20km Industrial 1500 Nos

15 A4 LIU (Line Interface Unit) 6/12/24F Splice Tray 400 Nos

16 A4 Patch Cords LC-LC SM Duplex 3m 2310 Nos

17 A4 Patch Cords Cat6A Shielded Assorted 5620 Nos

18 A4 OFC + HDPE + Splice Closures + Drop Cable + Accessories (Lot) Armoured OFC 12F/24F SM, HDPE 32/40mm, Splice Closures, 2F/4F drop (2,655 drops), pits, labels 1 Lot

19 A5 SPD Type-2 (Switch-Level) Surge Protection at switch site 1155 Nos

20 A5 SPD Type-3 (Camera-Level) Surge Protection at camera/pole 3966 Nos

21 A5 Earthing Kit ≤2 Ohm Independent Pit (per pole) 3966 Nos

22 A6 Signage Type A/B (8"/12”) Aluminium Retro-Reflective Bilingual En+Guj IRC 67:2001 2300 Nos

23 A6 Signage Type C/D (12"-24”) Larger Format Prominent 355 Nos

24 A7 Supply, Installation, Testing & Commissioning (civil work, reinstatement, trenching, ducting, fiber, power cable - per location) RCC Foundation (Excavation, RCC Concreting, Anchor Bolts) - remaining, Civil work, reinstatement, labour, trenching, ducting, fiber pulling, termination, IP config, PoE testing, commissioning 2655 Nos

25 A8 Memory Card (Minimum 256 GB Industrial MicroSD) 3966 Nos

26 A9 Supply, installation, testing, commissioning and integration of Body Worn Camera System including all devices, accessories, mounts, chargers, docking / charging / synchronization arrangement, evidence / video management platform, Data centre storage, Memory card , SIM cards/Wireless connectivity Charging Dock with Wired /Wireless connectivity for syncing with data centre, data plans, all required licenses, training, warranty, replacements and complete in all respects as per scope, specifications and directions of SCADL / AMC 100 Nos

SUB-TOTAL SCHEDULE A

SCHEDULE B - PRIMARY DATA CENTRE

27 B1 Application Server 2× CPU 16-core 128GB 2×480GB SSD Dual PSU 2U 2 Nos

28 B1 Database Server 2× CPU 16-core 256GB 2×480GB SSD FC HBA Dual PSU 2 Nos

29 B1 VMS Recording Server 2× CPU 128GB 25G NIC 2×480GB SSD FC HBA 8 Nos

30 B1 GPU Analytics Server 2× CPU 256-512GB 4× GPU (NVIDIA A30+) 2U 10 Nos

31 B1 EMS/NMS Server 2× CPU 128GB 2×480GB SSD 1 Nos

32 B1 Antivirus / EDR Server 1× CPU 64GB 2×480GB SSD 1U 1 Nos

33 B1 Backup Server 2× CPU 128GB 2×480GB SSD + 4×4TB HDD 1 Nos

34 B1 AD / Identity Server 1-2× CPU 64GB 2×480GB SSD (HA) 2 Nos

35 B2 Primary Storage 10 PB RAW, RAID-6, Enterprise Dual Controller NL-SAS, 5-yr warranty, 24×7, Five 9's 1 System

36 B2 Hot Tier Storage 40-60 TB NVMe RAID-10, IOPS- optimized 1 System

37 B2 Backup Storage 200-300 TB disk-based backup with dedup 1 System

38 B3 Core Router HA Enterprise 10G BGP/OSPF IPSec VPN 1 Lot

39 B3 Core Switch L3 HA 48×GE + 10G 2Tbps+ fabric 1 Lot

40 B3 Aggregation Switch L3 48×GE + 10G 4 Nos

41 B3 ToR/Access Switch L2 24/48×GE + 10G 6 Nos

42 B4 Next-Gen Firewall (NGFW) HA 20 Gbps FW, HA, IPS + App Control + SSL 2 Nos

43 B4 Load Balancer HA 10 Gbps L4-L7 HA ADC 2 Nos

44 B4 NDR Sensors 20 Gbps per sensor 3 Nos

45 B4 NDR Management Console Central AI/ML threat detection 1 Nos

46 B4 SIEM 1,000-1,500 Sources + MITRE ATT&CK + HA, 5- yr license 1 Lot

47 B4 Anti-DDoS Inline + Out-of-Path 1 Lot

48 B4 WAF 5 Gbps OWASP 1 Lot

49 B4 EDR / XDR Endpoint Detection & Response + SIEM/NDR integration 1 Lot

50 B4 Other Cybersecurity SSL VPN + NAC + PKI 1 Lot

51 B5 42U Server Racks 1,000mm depth + Dual PDU + Cable Management 10 Nos

52 B5 Precision AC (PAC) 20-25 TR, N+1 Downflow 3 Nos

53 B5 UPS System 100 kVA (N+1), 30-45 min VRLA 3 Nos

54 B5 DG Set 125 kVA ATS + CPCB-II + Acoustic 1 Nos

55 B5 Fire Suppression VESDA + Novec 1230 clean agent 1 Lot

56 B5 Access Control + DC Monitoring Biometric + Sensors + BMS logs 1 Lot

57 B5 DC Build-Out Package Structured Cabling + Raised Floor + Civil 1 Lot

SUB-TOTAL SCHEDULE B

SCHEDULE C - SOFTWARE LICENSES including Use cases

58 C1 VMS License Perpetual 3966 Nos

59 C2 VMS Mobile App License 100 Nos

60 C3 Video Wall Management Software 1 Lot

61 C4 EMS / NMS Suite + Helpdesk + SLA Monitoring 1 Lot

62 C5 ANPR 2028 Nos

63 C6 Encroachment Detection 1500 Nos

64 C7 Debris / Garbage Dumping 1750 Nos

65 C8 Cattle Detection on Road 528 Nos

66 C9 Vandalism / Property Damage 1767 Nos

67 C10 Over-Height / Unauthorized Vehicle 105 Nos

68 C11 Wrong-Side Driving 105 Nos

69 C12 People Count / Overcrowd 317 Nos

70 C13 Unattended Object Detection 317 Nos

71 C14 Spitting / Littering 300 Nos

72 C15 Red Light Violation Detection (RLVD) 10 Nos

73 C16 Mobile Phone Usage While Driving 10 Nos

74 C17 No Seatbelt Detection 10 Nos

75 C18 No Helmet Detection 10 Nos

76 C19 Wrong-Side Driving Detection 10 Nos

77 C20 Triple Riding Detection 10 Nos

78 C21 Blocking Free Left / Stalled Vehicle Detection 10 Nos

79 C22 Water Logging Detection 10 Nos

80 C23 Facial Recognition System 10 Nos

81 C24 Parking Occupancy Detection 100 Nos

82 C25 Speed Detection Analytics License 10 Nos

83 C26 Database License 2 Lot

84 C27 Unified Dashboard / Analytics Dashboard Software License 1 Lot

85 C28 Hypervisor / Virtualization Platform License 1 Lot

86 C29 Operating System License 1 Lot

SUB-TOTAL SCHEDULE C

SCHEDULE D - ICCC & CONTROL ROOM

87 D1 Video Wall Processor Multi-feed video decoding controller 1 Nos

88 D2 Display Units / Video Wall 55"/65" LED panels ≥800 nits, 5000:1 contrast, 100,000+ hrs, bezel-less 1 Set

89 D3 ICCC Networking VLANs, routing, core & access switches, cabling 1 Lot

90 D4 Operator Workstations i7 + dual monitors + keyboard + mouse + UPS 8 Nos

91 D5 ICCC Furniture & Console Ergonomic consoles + seating + lighting 1 Lot

SUB-TOTAL SCHEDULE D

SCHEDULE E - PROJECT MANAGEMENT & TRAINING

92 E1 Documentation, Sop, Training & Knowledge Transfer 1 Lump sum

SUB-TOTAL SCHEDULE E

TOTAL CAPEX (A+B+C+D+E)

Pre-Bid EOI for Selection of consortium partner for SITC, Operation and Maintenance of Surveillance System in Ahmedabad City Safe and Secure Ahmedabad (SASA II) (EOI No:TCIL/ITT1/125/2026 dated 21/04/2026)

PART B - OPEX TABLE(Annually)

Sr. No. Schedule Item Name Qty Unit Unit price Total Price GST (%) Total Price w/ GST

SCHEDULE F - CONNECTIVITY (5 Years)

1 F1 Connectivity: P2P/MPLS/ISP/Wireless 2655

SUB-TOTAL SCHEDULE F

SCHEDULE G - VIDEO ANALYTICS (Annually)

2 G1 ANPR 2028 Nos

3 G2 Encroachment Detection 1500 Nos

4 G3 Debris / Garbage Dumping 1750 Nos

5 G4 Cattle Detection on Road 528 Nos

6 G5 Vandalism / Property Damage 1767 Nos

7 G6 Over-Height / Unauthorized Vehicle 105 Nos

8 G7 Wrong-Side Driving 105 Nos

9 G8 People Count / Overcrowd 317 Nos

10 G9 Unattended Object Detection 317 Nos

11 G10 Spitting / Littering 300 Nos

12 G11 Red Light Violation Detection (RLVD) 10 Nos

13 G12 Mobile Phone Usage While Driving 10 Nos

14 G13 No Seatbelt Detection 10 Nos

15 G14 No Helmet Detection 10 Nos

16 G15 Wrong-Side Driving Detection 10 Nos

17 G16 Triple Riding Detection 10 Nos

18 G17 Blocking Free Left / Stalled Vehicle Detection 10 Nos

19 G18 Water Logging Detection 10 Nos

20 G19 Facial Recognition System 10 Nos

21 G20 Parking Occupancy Detection 100 Nos

22 G21 Speed Detection Analytics License 10 Nos

SUB-TOTAL SCHEDULE G

SCHEDULE H- DEVICES O&M

23 H1 Operations & Maintenance (O&M) of all the devices, hardware, including comprehensive preventive and corrective maintenance, repairs, replacements, and all associated costs across 2,655 locations. 1

SUB-TOTAL SCHEDULE H

SCHEDULE I - DC + ICCC O&M

24 I1 Operations & Maintenance (O&M) of DC IT and ICCC systems, including comprehensive preventive and corrective maintenance, repairs, replacements, and all associated costs. 1

SUB-TOTAL SCHEDULE I

SCHEDULE J - NDR O&M (5 Years)

25 J1 End-to-end NDR solution comprising yearly AI/ML-driven software subscription, 24×7vendor-managed SOC, SASA-I/II compliance coverage, and comprehensive preventive and corrective maintenance, inclusive of all operational responsibilities. 1

SUB-TOTAL SCHEDULE J

SCHEDULE K - MANPOWER (5 Years)

26 K1 DC/Network Admin 1

27 K2 System Admin 1

28 K3 NOC Operator + Helpdesk 2

29 K4 SOC Analyst L1 1

30 K5 Field Supervisor 2

31 K6 Project Manager (PMP/PRINCE2) 1

SUB-TOTAL SCHEDULE K

TOTAL OPEX (Annually)

Note: • Any software, firmware, embedded application, OEM utility, driver, operating module, controller software, management component, or mandatory basic license that is supplied by default with the hardware or is required for the hardware to function as intended under the project shall be deemed included in the quoted cost of that hardware item. No additional payment shall be made for such components unless specifically identified as a separate payable BOQ line item. • Detailed break-up / calculation of the O&M cost for the above line item(s), including componentwise scope, manpower if any, software / license support, preventive maintenance, corrective maintenance, repairs, replacements, Data storage /cloud / connectivity / recurring services wherever applicable, shall be submitted separately by the successful bidder at the time of signing of the Work Order / Agreement. However, the quoted amount in the Financial Bid shall be deemed to include the complete O&M scope as per tender conditions and should not vary from finanacial bid, and no additional payment shall be made by TCIL/ SCADL / AMC on this account. • As the project scope has significantly changed from the initial RFP, bidders may propose their system architecture and project design accordingly. In this regard, an extension of up to 30% for computing and GPU-related line items may be granted, subject to approval by the competent authority.

Pre-Bid EOI for Selection of consortium partner for SITC, Operation and Maintenance of Surveillance System in Ahmedabad City Safe and Secure Ahmedabad (SASA II)” (EOI No:TCIL/ITT1/125/2026 dated 21/04/2026)

PART-C: PRICE DISCOVERY ITEMS (NOT in L1 Evaluation)

Table P1: Indicative quantities for unit rate discovery only. NOT included in L1 evaluation.

Junction Components

Sr. No. Item Description Qty. Unit Unit Rate (in Rs. witho ut GST) Total Amount (in Rs. without GST) Total Amount (in Rs. with GST)

1 RLVD Lane Camera 4MP ANPR-capable lane enforcement camera with minimum 50/60 fps, suitable for RLVD and signal- synchronized traffic enforcement applications, IP65 or better 4 Nos

2 RLVD Evidence Camera 4MP wide-angle IP camera for evidence capture and contextual video recording at junctions, IP65 or better 4 Nos

3 Speed Detection Camera 4MP traffic enforcement camera with minimum 50/60 fps, suitable for speed detection applications, IP65 or better 4 Nos

4 RLVD Gantry Complete Complete gantry setup including gantry structure, civil foundation, junction box, power arrangement and allied accessories required for RLVD deployment 1 Nos

5 RLVD Edge Equipment Kit Complete field equipment kit per junction including switch, UPS, media converter, LIU and allied accessories 1 Nos

6 External IR Illuminato r Outdoor IR illuminator with minimum 100 m range, IP65 or better 16 Nos

7 Fixed Camera Fixed IP camera for surveillance, monitoring and analytics use cases at junctions, complete with required accessories 4 Nos

8 Bullet Camera Bullet IP camera for lane, directional and approach monitoring use cases, complete with required accessories 4 Nos

9 ANPR Camera ANPR-capable IP camera for vehicle number plate capture and traffic enforcement use cases, complete with required accessories 4 Nos

10 PTZ Camera PTZ camera for overview, situational monitoring, event tracking and enforcement support, complete with required accessories 4 Nos

11 Camera Mounting Hardware Mounting brackets, clamps, arms, fasteners and allied accessories required for installation of junction cameras 1 Lot

12 Pole / Gantry / Structural Mounting Pole / gantry / structural mounting support and allied hardware required for junction deployment 1 Lot

13 Outdoor Junction Box Weatherproof outdoor junction box with DIN rail, glands, connectors and required installation accessories 4 Nos

14 Industrial PoE / Field Switch Managed industrial / field-grade PoE switch for camera connectivity and junction field deployment 4 Nos

15 UPS / Power Backup UPS with required battery backup for field cameras and associated junction equipment 1 Nos

16 Surge Protection Surge protection arrangement for field equipment, cameras and power / data points 1 Lot

17 Earthing Kit Independent earthing / grounding arrangement for complete junction setup 1 Lot

18 Cabling and Accessorie s Power cable, ethernet cable, OFC accessories, connectors, glands, patch cords and allied installation materials required for complete junction setup 1 Lot

19 Edge Processing Hardware Field-deployable compute / analytics processing hardware for junction-based processing and evidence packaging, wherever required 4 Nos

20 SITC of Complete Junction Setup Supply, Installation, Testing and Commissioning of complete junction setup including all required cameras, cabling, switches, routers, OFC and allied accessories, media converters, LIU, junction boxes, UPS, surge protection, earthing, mounting hardware, brackets, connectors, patch cords, power accessories, installation materials and all other allied components / works required for complete and successful implementation of one junction, as per approved design and directions of SCADL / AMC 1 Lot

Total Junction Component NOT included in L1

TABLE P2: CLOUD-BASED DISASTER RECOVERY (DR)

Cloud DR Architecture

Sr. No. Item Description Qty. Unit Rate/Month (₹) Annual (₹) 5-Yr Total (₹)

21 Platform NIC Cloud / NICSI Empaneled / GSDC / AWS GovCloud India / Azure Govt India Lot

22 Mode Active-Passive Non-Core and Active-Active VMS EMS Lot

23 RPO 15 min or less Core / 1 hr. or less non- core Lot

24 RTO 30 min or less Core / 4 hrs. or less non- core Lot

25 Data Sovereignty All data within India Lot

26 Compliance MeitY Cloud Guidelines ISO 27001/27017/27018 SOC 2 Type II Lot

Total Cloud DR Architecture

Cloud DR BoQ (5 Years)

Sr. No. Item Description Qty. Unit Rate/Month (₹) Annual (₹) 5-Yr Total (₹)

27 Application VMs 16 vCPU 64GB 200GB SSD 2 VM/Mo

28 Database VMs 16 vCPU 128GB 500GB SSD 2 VM/Mo

29 Recording VMs 16 vCPU 64GB 200GB SSD 4 VM/Mo

30 GPU Analytics VMs 16 vCPU 128GB 2xNVIDIA T4 5 VM/Mo

31 Utility VMs 8 vCPU 32GB 200GB SSD 2 VM/Mo

Sub-Total Compute 15 VMs

32 Object Storage DR Video S3-compatible 2,20 0 TB/Mo

33 Block Storage SSD NVMe IOPS- optimized 35 TB/Mo

Sub-Total Storage 2.2 PB

34 VPN Gateway S2S Encrypted Redundant 2 Nos/Mo

35 Data Transfer Egress Outbound peak 50 TB/Mo

36 VPC/Internal Networking VPC subnets NACLs 1 Lot/Mo

Sub-Total Network

37 Cloud Security Stack NGFW+WAF+Ddo S+SIEM DR 1 Lot/Mo

Sub-Total Security

38 Cloud Monitoring and Orchestration Alerts automated failover 1 Lot/Mo

39 DR Drill and Testing Bi-annual failover drill 2 per yr Nos/Yr

40 Cloud DR Setup One- Time Architecture deployment integration 1 Lot

41 Data Replication License 5-yr Continuous DC-to- Cloud replication 1 Lot/Yr

SCHEDULE F: VIDEO WALL (CAPEX)

42 Video Wall Solution- in 9 X 3 arrangement (with video Controller) 9x3 arrangement, 5000 nits’ brightness, 5000:1 or better contrast ration, 100000+ hours life, bezel less, LED Type 1 Nos

Sub-Total Management

TOTAL CLOUD DR 5 YEARS

Note: • The following items are included for price discovery / unit rate discovery only and are not included in L1 evaluation, unless specifically incorporated elsewhere in the revised BOQ. The quantities indicated are tentative and indicative only. SCADL / AMC reserves the right to procure any or all these items, fully or partially, at the discovered rates during the contract period, based on joint survey, actual requirement, approved design and operational need. All quoted rates shall include complete supply, installation, integration, commissioning, applicable licenses, accessories, warranty, support and other associated obligations as per tender conditions. • NIPS will serve as the threat‑prevention appliance in place of UTM as referred in the RFP. • Ensures 99.5%And system uptime through continuous monitoring and preventive maintenance. • Reduces unexpected failures of outdoor devices operating in heat, dust, rain, and high‑humidity environments. • Provides fixed annual budgeting and eliminates unpredictable emergency repair costs. • Prevents downtime penalties and avoids delays due to emergency procurement cycles. • Delivers mandatory CERT‑IN patching, quarterly updates, and annual VAPT. • Keeps all firmware and OS versions aligned with OEM security advisories. • Maintains OEM warranty validity by performing required servicing and firmware updates. • Prevents warranty voidance due to missing logs, skipped maintenance, or outdated firmware. • Maintains analytics accuracy by countering AI model drift caused by lighting, seasonal changes, construction, and traffic pattern evolution. • Keeps ANPR, RLVD, helmet detection, mobile‑use detection, FRS, and other models tuned with periodic recalibration. • Continuously monitors MPLS links for packet loss, jitter, and latency to sustain video and analytics workloads. • Ensures DR and auto‑failover readiness through scheduled failover drills. • Maintains interoperability across multi‑vendor components-cameras, PoE switches, edge devices, VMS, analytics, and DC hardware. • Prevents system instability caused by uncoordinated firmware updates across vendors. • Offers fixed SLA commitments with rapid response times (2–4 hours for critical issues). • Provides a single accountable ownership layer, avoiding blame‑shifting among vendors. • Ensures smooth functioning of mission‑critical enforcement systems during festivals, emergencies, VIP movement, and city events. • Keeps enforcement datasets, logs, and evidence streams consistent and audit‑ready for legal use. • Supports long‑term service continuity with documented maintenance history and performance reports.