This workbook was made to compare cases without mixing assumptions and outputs in the same place.
The structure lets a reader move from assumptions to scenarios and then to grant coverage, so the logic stays visible.
Workbook Archive
Scenario workbook comparing operating assumptions, funding choices, and delivery constraints for the xTend prosthetic arm project.
A scenario workbook that shows how funding and delivery assumptions change the plan.
This workbook was made to compare cases without mixing assumptions and outputs in the same place.
The structure lets a reader move from assumptions to scenarios and then to grant coverage, so the logic stays visible.
Source sheet: 00_Read_Me
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| xTend — Funding Plan Scenarios | ||||
| Forward-looking. All inputs derived from confirmed source figures. | ||||
| This workbook answers: 'What does it cost xTend to deliver N arms, and what funding does it need to raise?' All cost inputs come from the P2 file (£91/arm basic, £158/arm bionic, £1,046 Phase 1 equipment, £3,378 Capacity Build). Arm-count targets are scenario inputs — edit cells in '02_Scenarios' to model alternative plans. | ||||
Source sheet: 01_Assumptions
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| Confirmed-source Assumptions | ||
|---|---|---|
| Input | Value (£) | Source |
| Cost per basic arm (materials + delivery) | £91 | P2 file, Phase 1 sheet: £46 + £45 |
| of which materials | £46 | P2 file, Phase 1 sheet, R19 |
| of which delivery | £45 | P2 file, Phase 1 sheet, R23 |
| Cost per bionic arm (components + delivery) | £158 | P2 file, Phase 2 sheet, R27 |
| of which components | £130 | P2 file, Phase 2 sheet, R20 line total |
| of which delivery | £40 | P2 file, Phase 2 sheet, R24 |
| Phase 1 equipment (one-time) | £1,046 | P2 file, Phase 1 sheet, R11 |
| Capacity build — equipment (one-time) | £2,463 | P2 file, Capacity sheet, R11 |
| Capacity build — prototyping (one rotation) | £915 | P2 file, Capacity sheet, R18 |
| Capacity build total | £3,378 | P2 file, Capacity sheet, R20 |
| Phase 2 operational tooling | £133 | P2 file, Phase 2 sheet (sum of itemised lines) |
| NHS comparator per arm | £2,600 | HY CV, Abstract paragraph 2 |
| Arms delivered to date | £1 | CV: 1 arm to Ksar el Kebir, Morocco within ~6 months of founding |
Source sheet: 02_Scenarios
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| Funding Plan — Scenarios (editable arm counts) | ||||
|---|---|---|---|---|
| Line | A: 'Steady' | B: 'Capacity Build' | C: 'Wolfson + Capacity' | D: 'Stretch' |
| Basic arms delivered | 10 | 30 | 50 | 100 |
| Bionic arms delivered | 0 | 5 | 10 | 20 |
| Equipment plan (one-time £) | £1,046 | £3,378 | £3,378 | £3,378 |
| Phase 1 equipment | £1,046 | £1,046 | £1,046 | £1,046 |
| Capacity build (add'l) | 0 | 2332 | 2332 | 2332 |
| Basic arms cash (basic × £91) | £910 | £2,730 | £4,550 | £9,100 |
| Bionic arms cash (bionic × £158) | £0 | £790 | £1,580 | £3,160 |
| Phase 2 tooling (if any bionic) | £0 | £133 | £133 | £133 |
| TOTAL FUNDING REQUIRED (£) | £1,956 | £7,031 | £9,641 | £15,771 |
| Arms total | 10 | 35 | 60 | 120 |
| Avg cost per arm (incl. equipment) | £196 | £201 | £161 | £131 |
| Equivalent NHS cost saved (£) | £24,044 | £83,969 | £146,359 | £296,229 |
| Funding gap vs known cash on hand (placeholder) | TBD — fill cash-on-hand | TBD — fill cash-on-hand | TBD — fill cash-on-hand | TBD — fill cash-on-hand |
Source sheet: 03_Grant_Coverage
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| Which Grants Would Close Each Funding Need | |||||
|---|---|---|---|---|---|
| Scenario | Funding required | Weighted pipeline (per 02_Grant_Pipeline) | Headline grants needed | Coverage ratio (weighted) | Comment |
| A: 'Steady' — 10 basic arms | £1,956 | £8,500 | Ann Rylands + 1 small trust covers this | 435% | Phase 1 only — no new equipment needed if already purchased |
| B: 'Capacity Build' — 30 basic + 5 bionic | £7,031 | £8,500 | Bailey Thomas + Anton Jurgens + Westham House | 121% | Adds 2× Cr-10, 3× Bamboo, prototyping |
| C: 'Wolfson + Capacity' — 50 basic + 10 bionic | £9,641 | £33,500 | Wolfson £25k + 2–3 mid-size trusts | 347% | Wolfson opens up the model |
| D: 'Stretch' — 100 basic + 20 bionic | £15,771 | £33,500 | Wolfson + James Tutor + Anton Jurgens + corporate top-up | 212% | Multi-funder coordination required |