Traceability needs constant upkeep
Mission, spacecraft, payload and ground-segment requirements drift across sheets as the design changes and new owners join the programme.
For fast-moving space teams
Spend time building, not managing requirements spreadsheets.
Arc is AI-assisted requirements management software for space teams. It connects spacecraft requirements, traceability, change impact, tests and verification evidence in one controlled programme record.
02 The operating reality
Spreadsheets break as programmes move.
Commercial space teams often hold mission, spacecraft and ground-segment requirements together manually. As architectures and interfaces change, maintaining traceability and verification evidence becomes a systems engineering workload of its own.
01 Mission + external inputs
02 Requirements + product
03 Cross-cutting controls
04 Verification + evidence
05 Configuration + change
Mission objectives.docx
CONOPS.docx
Customer spec.docx
Launch constraints.docx
Mission reqs.xlsx
System reqs.xlsx
Space segment.xlsx
Ground segment.xlsx
Launch interface.xlsx
Payload reqs.xlsx
Bus reqs.xlsx
Operations reqs.xlsx
Ground equipment.xlsx
Equipment specs.xlsx
Interface register.xlsx
Architecture + modes.docx
Mass + power budgets.xlsx
Data + link budgets.xlsx
Risk + hazard log.xlsx
V&V plan.docx
Verification control.xlsx
Test procedures.docx
Analysis reports.xlsx
Test results.xlsx
Compliance closure.xlsx
Document register.xlsx
Baseline index.xlsx
Change requests.xlsx
Impact assessments.xlsx
Waivers + deviations.xlsx
Review actions.xlsx
Spreadsheet friction starts at kick-off, compounds with every update and becomes delivery risk at review.
Every change creates more admin
Space systems engineers manually search upstream and downstream links to understand what a design or interface change affects.
Reviews become reconstruction exercises
Before SRR, PDR, CDR and flight-readiness reviews, teams pull together requirement status, test results and verification evidence by hand.
03 Arc product
Arc keeps the whole engineering programme connected.
Give systems engineers and every discipline one structured workspace for requirements, architecture, systems and tests, with agents helping the team keep every dependency current as the programme changes.
03.01 Product feature
Single source of truth
Bring spacecraft requirements, architecture, systems and verification into one flexible, structured workspace that models the programme your way. Define the item types, fields and relationships your engineering process needs across the bus, payload and ground segment, so every item stays connected without being forced into a fixed schema.
Requirements
Create, assign, review and evolve requirements in one connected record.
Architecture
Map system structure, subsystem boundaries and the interfaces between them.
Systems
Organise components, parameters and requirements within each system.
Tests
Trace every requirement to its test cases, results and verification evidence.
03.02 Product feature
Collaborative workspace
Use Git-style branches to give spacecraft, payload and ground-segment engineers a safe place to propose changes. Compare diffs, discuss the work in context, resolve conflicts and merge approved updates back into the programme baseline.
Team collaboration
Manage permissions, ownership and comments directly alongside the requirement.
SystemUpper stage
SubsystemPropulsion
SubsystemFlight control
Requirement · PROP-014Burn duration3 comments
TestHF-027Linked
MM
MoniqueCan we link HF-027 before merge?
Branching & merging
Propose changes safely, compare the diff and merge approved work into the baseline.
ViewingProgramme baseline
⌄
BaselineApproved record · 2d ago
Current
burn-durationJosh · Ready for review
+4−2
hotfire-evidenceMonique · Updated now
+1
Proposal #184
Update qualified burn duration
2 files changed +4 −2
−145 s
Qualified burn duration+160 s
Qualified burn duration
No conflicts · 2 approvals
03.03 Product feature
Impact analysis
A single spacecraft requirement or interface change can ripple through dozens of downstream artefacts. See the full blast radius, including affected test cases, design elements and sibling requirements, before you commit.
Impact trace ready
Programme dependency graph
- Items
- 125
- Levels
- 7
- Tests
- 25
- Affected
- 67
The graph contains 100 requirements and 25 test cases arranged across seven levels. Severe impacts include test case HF-002 and eight items across the final two levels; unaffected branches remain neutral.
03.04 Product feature
Agents
Use read-only agents to monitor space-programme context, check coverage and surface issues. Use drafting agents to propose suggested changes for engineers to review, so your team stays in control.
05 Outcomes
Keep fast-moving development ready for review.
See how a change reaches the spacecraft, payload, launch interface and ground segment, then reach each lifecycle review with current verification evidence instead of relying on a last-minute spreadsheet exercise.
Keep engineering time on the product
Give the spacecraft, payload and ground teams a current view of requirements, interfaces, tests and evidence without adding another layer of coordination.
Catch change impact early
Trace affected requirements, interfaces and verification work before a subsystem decision becomes programme-wide rework.
Keep verification aligned
Maintain ownership, coverage and evidence as the spacecraft evolves, so the next lifecycle review starts from a trusted record.
06 Govern
Built for Enterprise.
Your space programme. Your audit trail. Your deployment controls.
Governance
Control access and change
Full control and visibility across requirements, reviews and verification evidence.
- Role-based access for sensitive programmes
- Connected change history and review controls
- Traceable evidence for audit preparation
Security
Protect engineering data
Security controls tailored to the requirements of each deployment.
- Engineering data encrypted in transit and at rest
- Configurable retention and access policies
- Customer content is never used to train third-party models
Deployment
Deploy on your terms
Choose the deployment model that fits your infrastructure, security and governance requirements.
- On-prem deployment within your own infrastructure
- Bring your own agent and approved model providers
- Cloud hosting managed by Arc
07 FAQs
Frequently Asked Questions
What requirements management software should a space team use?
A space team should choose software that fits its programme scale, assurance obligations and engineering workflow. The tool should connect mission, system and subsystem requirements to interfaces, decisions, tests and verification evidence while preserving clear ownership, baselines and review history. Arc is designed for this connected space-programme workflow, but teams should evaluate it against their security, integration and contractual requirements.
Is Arc suitable for space startups and scaleups?
Arc is designed for commercial space teams that need to move beyond spreadsheets without imposing a rigid enterprise process. A team can begin with one programme, system or review, preserve its own item types and relationships, and expand the connected record as the organisation, supplier network and verification workload grow.
Can Arc support ECSS and NASA-aligned workflows?
Arc can support workflows that use ECSS or NASA systems-engineering guidance by connecting requirement sources, allocations, baselines, changes, verification methods, results and evidence. The programme defines the applicable standards, tailoring and approval gates. Arc supports the resulting process and audit preparation; it does not itself certify compliance or replace programme judgement.
How does Arc replace requirements spreadsheets?
Arc imports the requirements, fields, links and verification information from an active spreadsheet and maps them into connected records. Teams can then review the structure, assign ownership, propose changes in branches and generate current traceability and coverage views instead of reconciling copied cells and fragile file links by hand.
How does Arc use AI while keeping engineers in control?
Arc uses read-only agents to inspect approved programme context, check coverage and surface potential issues. Drafting agents can propose requirement or relationship changes for review. They do not make meaningful engineering approvals: engineers examine the source context, accept or reject proposals and control what enters the programme baseline.
Can Arc run in a customer-controlled or on-premises environment?
Yes. Arc can be deployed with a customer-hosted backend or in a customer-controlled environment, including on-premises and firewall-contained deployments. The precise architecture, approved model providers, access controls, retention rules and data-processing boundaries are agreed with the customer security and infrastructure teams for that deployment.
Can Arc connect spacecraft requirements to verification evidence?
Yes. Arc can connect a spacecraft requirement to its source, allocation, verification method, test or analysis case, result and evidence record. As the design changes, teams can inspect affected links and coverage, keep evidence associated with the correct requirement version and prepare current views for lifecycle and flight-readiness reviews.
Explore Engineering guidance
Space requirements resources
Independent source check
Still deciding whether Arc fits your programme?
Ask your preferred AI assistant to review Arc’s published product evidence for your team.
09 Get started today
Move faster without compromising engineering rigour.
Try Arc for free and see how AI agents help keep spacecraft requirements, traceability and verification evidence aligned as your commercial space programme changes.