Deep dive ③ · Define

Requirements · Functions · Logical

The simulation conclusions become a formal RFLP model — a 51-requirement SRS with derive links, 13 functions in a real decomposition, and a 13-block logical architecture — every layer materialized as configuration-managed structures in the live Teamcenter.

Tool: Teamcenter Active Workspace 51 requirements 13 functions 13 logical blocks

Requirements — the whole SRS

51 requirements, every domain, in Teamcenter

Not a handful — the full software/system requirement set is 51 requirements, authored as configuration-managed Requirement items and searchable in the live instance. A search for REQ-000* returns 56 results — the requirements plus the SRS spec and its section headers — spanning power (REQ-PWR), performance (REQ-PERF), structure (REQ-STR), control (REQ-CTRL), reliability (REQ-REL) and more, with the reliability set traced line-by-line to the MADe analysis.

Teamcenter search returning 56 QX-250 requirements across domains
Teamcenter — the QX-250 SRS. 56 results for the requirement set (55 Generic Requirement + 1 Requirement), shown with the type facet and requirements across every engineering domain.Active Workspace · global search REQ-000*
The reliability loop closes here. The loss-of-thrust budget (REL-003) formally derives the dual-battery (REL-008) and redundant-flight-control (REL-009) requirements — 42 derive links in all — so the MADe decision is enforced as traceable requirements, not a note in a report.

Functions & logical — the relations view

Thirteen functions, thirteen blocks, one connected architecture

Nine leaf functions (F1–F9), a derived "Manage Redundancy" function, and the three decomposition parents — 13 functions in all — each allocated to a logical block; 13 logical blocks including both battery packs and both flight controllers. The functions are a real decomposition — the parents FA Provide Propulsion, FB Provide Flight Control and FC Provide Airframe sit above the leaf functions — all live as Functionality items in Teamcenter.

Teamcenter search returning 13 QX-250 function items
Teamcenter — the function set. 13 results (Function Revision) — the nine leaf functions plus the FA/FB/FC decomposition parents and the derived redundancy function, each an fx Functionality item.Active Workspace · global search QX-F*

And the relation graph below — rendered by Active Workspace with its legend — is the point: this isn't a list, it's a connected model, and the legend counts prove the depth.

And each of the three architectures is a real top-level structure in Teamcenter — a parent-child tree in the system of record, not a flat list.

QX-250 System Requirements Specification structure in Teamcenter Active Workspace
Requirements — the specification structure. QX-250 System Requirements Specification (REQ-000058) over eight domain sections and all 51 requirements, rendered as a numbered spec tree (1 Section 1 → 1.1 REQ-SYS-001 → …). Active Workspace · Requirements ACE editor
QX-250 Functional Architecture structure in Teamcenter Active Workspace
Functions — the functional architecture. QX-250 Functional Architecture (038909) decomposed into FA Provide Propulsion / FB Provide Flight Control / FC Provide Airframe, each over its leaf functions (F1 Store Electrical Energy, F2 Distribute Power, F3 Drive Motor (ESC), …).Active Workspace · Functional architecture (fx)
QX-250 Quadcopter Logical Architecture structure in Teamcenter Active Workspace
Logical — the logical architecture. QX-250 Quadcopter Logical Architecture (System Block) over all 13 logical blocks — including the reliability-driven redundancy: U2 Flight Controller (redundant), PWR1 Dual-Battery OR-ing / BMS and BT2 Battery 4S LiPo (redundant).Active Workspace · Logical architecture
QX-250 Quadcopter Logical Architecture block diagram in Teamcenter Active Workspace, expanded to all 13 blocks
Logical — the architecture diagram, expanded. The same System Block, rendered as the Active Workspace architecture diagram and expanded to show all 13 logical blocks nested in the QX-250 Quadcopter Logical Architecture container — the four motors, the PDB/ESC, both flight controllers (U1 + U2 redundant), both battery packs (BT1 + BT2 redundant) and the PWR1 dual-battery BMS, the ELRS receiver, the VTX and the LED/buzzer.Active Workspace · Architecture · full-screen · Automatic Layout
Teamcenter Relations graph of the QX-250 logical architecture — root plus 9 child blocks, with toolbar and legend
Teamcenter — logical architecture Relations graph. The QX-250 Quadcopter Logical Architecture System Block (bottom) expanded to all 9 child logical blocks via the Relations graph — rendered live with the Apply-Layout / Legend toolset. Note both battery packs: BT1 Battery 4S LiPo and the reliability-driven BT2 Battery 4S LiPo (redundant), alongside the four motors, the VTX, the ELRS receiver and the LED/buzzer.Active Workspace · Relations · General view · Top-to-Bottom layout
The thread continues → Physical. These R/F/L structures now have a physical counterpart: the QX-250 assembled in NX from real standard parts on the same 125 mm datum — both flight controllers and both battery packs realized as positioned geometry. That closes RFLP end-to-end. See Mechanical — NX.