# 07 — Assumptions Ledger

Living ledger. Rows are appended as Phase 5a/6/7 progresses. Each assumption flagged during reasoning is captured here with rationale and impact-if-wrong.

**Last updated:** 2026-04-29 (revision 2 — formal bid pack received; many former assumptions now spec-anchored and removed from the ledger; the remaining assumptions live below).

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## Scope-shape and counterparty (Phase 1–3, anchored to TOR + email)

| ID | Statement | Rationale | Basis | Impact if wrong |
|----|-----------|-----------|-------|-----------------|
| A-001 | Counterparty entity for the executed contract is **SMC MASS RAIL TRANSIT 7, INC.** Procurement channel is SMHC (BPG). | TOR cover page + Email project name. | TOR cover; Email_Text; D-001 | Low — re-issue cover letter; recoverable. |
| A-002 | The 11 PART sheets in `MRT7 INTEGRATION BOQ.xlsx` (Tandang Sora Station construction) are **out of scope**. Bid prices only the INTEG BOQ sheet (12 lump-sum lines for Phase 1 + Phase 2). | User direction (D-008). | Confirmed | None — confirmed by user. |
| A-003 | **Station scope: 12 stations (1–12).** Stations 13 (Tala) and 14 (San Jose del Monte) excluded. Confirmed by user direction (D-015) + TOR §4.1. | TOR §4.1 + user confirmation 2026-04-29 | TOR §4.1; D-015 (user direction) | Confirmed — no risk. |
| A-004 | Scope shape = full turnkey: supply + delivery + installation + integration + T&C. All Phase-5a installation pathways activate. | TOR §1 + §4 + §11.3 (lump sum). | TOR; D-004 | None — confirmed by TOR. |
| A-005 | **Site Development conduit installation is OUT of our scope** per TOR §9.1. We pull cables through ductbank/manholes installed by Civil Contractor / REC. | TOR §9.1 + Resp. Matrix. | TOR §9.1; D-010 | None — confirmed. |
| A-006 | **EMCS is OUT of scope — confirmed by user direction (D-015).** Bid prices only FDAS (Item 1123) + ACS (Item 1124) + supporting general provisions (Items 1116–1122 + 1128). C1 §1125–1127 EMCS sections and ANNEX_A 13008/13011A/13011B EMCS drawings are reference / awareness content only — not in our scope. | TOR §4 mentions only FDAS + ACS; user explicit direction 2026-04-29: *"Scope is only for FDAS and ACS, 12 stations."* | TOR §4; D-011; D-015; Q-014 closed | Confirmed — no risk. |

## Engineering-spec assumptions (Phase 5a inputs; revised with C1/C2/D1/D2)

| ID | Statement | Rationale | Basis | Impact if wrong |
|----|-----------|-----------|-------|-----------------|
| A-101 | FDAS workstation software platform = **Honeywell-Notifier OnyxWorks** (or VeriFire Tools where engineering-only software is needed). FDAS panel at Civil-Contractor sites = Notifier NFS2-3030 (D1). | ANNEX_D1; ANNEX_C1 §1123.2.8.C *"Graphical monitoring interface (GUI) compatible with Notifier NFS2-3030."* | D1 datasheet; C1 spec; D-012 | Brand-locked by spec — if customer accepts equivalent, alternate platform (e.g., Honeywell EBI with Notifier integration module) acceptable. Functionally equivalent per email's clause. |
| A-102 | ACS workstation software platform = **Suprema BioStar 2** (BioStar 2 Enterprise license assumed for multi-site management). ACS controllers at Civil-Contractor sites = Suprema CoreStation CS-40 (D2). | ANNEX_D2; ANNEX_C1 §1124.2.6.B mentions BioStar memory sizing. | D2 datasheet; C1 spec; D-012 | Brand-locked; same equivalent-items provision applies. |
| A-103 | **Workstation monitor size: 32" LED** per BOQ INTEG BOQ row 1123.2.8.A (overrides spec §1123.2.8.A "24 LED" given the BOQ is the customer's bid item). Bid will note the spec discrepancy in cover commentary. | BOQ INTEG BOQ verbatim: *"To use 32 LED Monitor"*; ANNEX_C1 §1123.2.8.A: *"Display: 24 LED monitor, Full HD (1920x1080)"*. | BOQ vs C1 spec conflict; Q-015 raised | If customer enforces 24" spec: -PHP 5-10k per workstation (4 workstations = -PHP 20-40k). Trivial. |
| A-104 | **UPS sizing: 2 kVA / 1.6 kW online double-conversion**, 15-30 min runtime at full load, 230 V 60 Hz, pure sine wave, per ANNEX_C1 §1123.2.8.E. Apply per workstation system: 4 UPS units (FDAS @ OCC, FDAS @ FCCR, ACS @ OCC, ACS @ FCCR). Remote depot building gateway-only locations: 1 kVA UPS. | ANNEX_C1 §1123.2.8.E | Spec-anchored | Spec-locked; no risk. |
| A-105 | Server hardware: Intel Xeon Silver 2.2 GHz+, 64 GB ECC RAM, 2× 2 TB HDD RAID-1 + 512 GB SSD OS, Windows Server 2019 LTS, dual PSU, RAID controller, dual Gb Ethernet, 4U rackmount, 6 expansion bays. Apply: 1 server per system @ OCC + 1 per system @ FCCR (4 servers total — FDAS×2, ACS×2). | ANNEX_C1 §1123.2.8.B + §1124.2.7. | Spec-anchored | Spec-locked. |
| A-106 | L2 network switch (workstation-side) = managed industrial Ethernet, 8× 10/100/1000 ports + 4 SFP per Resp. Matrix, STP/RSTP/ring, DIN/rack mount, 24-48 VDC, -40 °C to +75 °C, IP30, UL 508. Vendor: TBD per Phase 9 RFQ — defaults to Hirschmann / Moxa / Phoenix Contact (UL-508 industrial Ethernet, NOT China-made per TOR §8.10). | ANNEX_C1 §1123.2.8.D + Responsibility Matrix item "L2 Network Switch (24-Ethernet port + 4 SFP port)." | Spec; Resp. Matrix; TOR §8.10 | Vendor flexibility within spec — no impact on bid value beyond ±5%. |
| A-107 | **Badge printer = ZebraID-class** card printer for ACS. **Laser printer = HP LaserJet color**, ≥30 ppm, 1200 dpi, 50K pages/month duty (FDAS workstation peripheral). | ANNEX_C1 §1124.2.12 (badge printer) + §1123.2.8.F (laser printer). | Spec | Spec-locked. |

## Cable & route-length assumptions (Phase 5a inputs; revised with ANNEX_A drawings)

| ID | Statement | Rationale | Basis | Impact if wrong |
|----|-----------|-----------|-------|-----------------|
| A-201 | **Phase-1 station-to-OCC connectivity uses ROTEM IP-MPLS backbone for primary FDAS+ACS data.** Our scope at the station is the gateway/interface card device only (per Resp. Matrix). No long station-to-OCC cable run is in our cable-schedule. | TOR §4.7 + Resp. Matrix Phase 1 row 1: *"Communication Network (Station to Depot-OCC) — ROTEM (✓)."* | TOR; Resp. Matrix | None — explicit. |
| A-202 | **Phase-2 inter-building cable lengths to be MEASURED from ANNEX_A drawings 13002/13003/13004 (site dev plan layouts) and 13005 (conduit and handhole schematic)** during Phase 5a, per the per-working-doc decision table in 03-doc-inventory.md. Typical-range tiers populated only as a sanity-check, not as primary basis (Op#10). | ANNEX_A drawings now received; previous typical-range fallback (D-005) superseded. | ANNEX_A; D-014 | Measurement is the basis — fallback only if a specific cable's drawing reference is unclear (logged per row). |
| A-203 | **Conduit-to-cable ratio for our scope = ~50%** (we install conduit only at building stub-ups + workstation drops; underground conduit by Civil Contractor per A-005). Higher than helper's 30% global default; per-project context table populated in `05-working-docs/A3-route-lengths.yaml` per Op#11. | TOR §9.1 (we exclude site-dev conduit) + §4.8 (we connect to Civil-Contractor-installed FACP/Core Station — implies stub-up conduit to building penetration is ours). | TOR §9.1, §4.8; Op#11 | Within ±15% of estimate is acceptable. Q-017 may refine. |
| A-204 | **Cable specifications per ANNEX_C1 §1121** (control communication cables) and §1122 (raceways/boxes). FOC for backbone; STP for control/data. Specific gauge/jacket/UL listing per spec — Phase 5a deep-read closes the BOM. | C1 §1121, §1122 | Spec | Spec-locked. |
| A-205 | **Line surge protection** required for inter-building FOC and STP per TOR §4.2. Each inter-building cable terminates at a surge-suppressor block (e.g., DITEK, Phoenix Contact) at both ends. | TOR §4.2 | Spec-supported | Trivial cost item. |

## Production-rate / manhour assumptions (Phase 5a B4 inputs)

| ID | Statement | Rationale | Basis | Impact if wrong |
|----|-----------|-----------|-------|-----------------|
| A-301 | Production-rate modifiers (per Op#11 typical-ranges, populated in B4 helper context table): | | | |
|     | • Greenfield depot: standard productivity (1.0×). | TOR §1, §11.4 | — | — |
|     | • Multi-station coordination overhead: +20% per-station effort due to travel, rolling-stock-window scheduling, ROTEM coordination. | TOR §4.10, §4.13 | — | If 24-hr access permitted at all stations, modifier might drop to +10%. ~10% of B4 manhour cost. |
|     | • Stations under construction: assume daytime weekday access; no rolling-stock testing window applies during construction phase (testing phase post-handover). | A-003 (12 stations + greenfield) | — | If rolling-stock testing already underway: night-shift premium adds. |
|     | • 24-hour shift availability: TOR §11.4 contemplates 24-hr shifts. Productivity unchanged but resource-loading peak smoother. | TOR §11.4 | — | — |
|     | • No-subcontracting on Electronics works: single-team productivity holds (no specialty-trade savings, no coordination losses). | TOR §8.6 | — | — |
| A-302 | **Chipping works** (TOR §4.9 — concrete/wall/under-slab penetrations) is a minor civil-trade activity in our scope; estimated 1.0 manday per penetration × estimated 50 penetrations across the 14 sites = 50 mandays (~PHP 50,000 labor + materials). | TOR §4.9; engineering judgment per typical FDAS+ACS multi-building install. | Engineering judgment | If actual penetrations are 100+, double the line. Bid line is small relative to total. |

## Commercial assumptions (Phase 6+ BOQ pricing)

| ID | Statement | Rationale | Basis | Impact if wrong |
|----|-----------|-----------|-------|-----------------|
| A-401 | **VAT-inclusive pricing** as required by Email_Text item 2. All BOQ unit costs and lump sums quoted include 12% VAT. | Email_Text §2; TOR §3.4 *"Bid Price... value added tax (VAT)... included."* | Email; TOR §3.4 | Confirmed. |
| A-402 | **Surety bond cost provisioning:** Advance Payment Bond (full advance) + Performance Bond (20% of Contract Price, valid until Taking-Over) + Warranty Bond (10%, valid 2 years). Bond premium estimated at 0.5–1.0% per bond per year of validity. Total provisioning ≈ 1–2% of Contract Price as an embedded cost line. | TOR §11.6.1 | TOR | If actual bond rates higher (e.g., new contractor without surety history): +0.5–1% to bid value. |
| A-403 | **Retention 10%** released per Contract Price-conditioned schedule (typical: 5% on Provisional Acceptance, 5% on Final Acceptance after 1 year). Cash-flow impact captured in proposal commentary. | TOR §11.6.2 | TOR | Standard. |
| A-404 | **Price validity: 6 months from submission** per TOR §11.9 (overrides email's 30-day stipulation). Suppliers' RFQ quotes for procurement need ≥6-month validity to match — Phase 9 RFQ template requires this. | TOR §11.9; D-013 | TOR | If supplier quotes carry 30-day validity, lock-in risk for 5 months — manage via contractor-bears-risk pricing or supplier MoU. |
| A-405 | **Currency: PHP** (Philippine Peso). | TOR; standard for SMC. | TOR | None. |
| A-406 | **Permits + duties + taxes + insurance** included in lump sum (TOR §11.2 + §3.4). Local + LGU + MMDA + DOLE permits, BOC duties on imported items, all-risk + third-party + workmen's-compensation insurance. | TOR §11.2; pre-bid §8 | TOR | None — explicit. |
| A-407 | **FAT travel cost is a SEPARATE BOQ line item** (per D-016 user direction), not absorbed into lump-sum integration items. Two line items: FAT-USA-Notifier travel + FAT-Korea-Suprema travel. Each covers Owner rep + DOTr rep + Contractor witness round-trip airfare, hotel, per diem, ground transport. Estimated 5-7 day duration each, PHP 0.8–1.5M per trip (combined PHP 1.5–3M for both). | D-016; TOR §3.8 (FAT at manufacturer's facility) + §8.11 (Owner+DOTr+Contractor witness) | TOR; D-016 | If customer instructs videoconference witnessing or reduces team size, line-item adjusts at evaluation. |

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*Numbering convention: A-001+ scope; A-101+ engineering-spec; A-201+ cable/route; A-301+ production-rate; A-401+ commercial. New rows continue sequentially within their category.*