PRODUCT

Import, trace, and verify every requirement

Stell replaces scattered documents with a single source of truth — purpose-built for engineers who manage compliance across complex programs.

PRODUCT

Import, trace, and verify every requirement

Stell replaces scattered documents with a single source of truth — purpose-built for engineers who manage compliance across complex programs.

PRODUCT

Import, trace, and verify every requirement

Stell replaces scattered documents with a single source of truth — purpose-built for engineers who manage compliance across complex programs.

Two Views

Document meets compliance matrix

Toggle between a rich document editor and a structured compliance matrix. Write requirements as prose, then take action on them as data — all in one view.

Specifications/NSLS Level 0

NSLS Level 0

V2REVIEW
Reviewers 🔔Release ›Share ›
↩ # PRG-1130LUNAR LANDINGLEVEL 1

Table of Contents

Auto-number: Off

1.0 Introduction
2.0 Scope
3.0 System Performance Requirements
3.1 General Performance
4.0 Verification Methods
5.0 Conclusion

Original Document 📄    Auto-number: Off

3.0 System Performance Requirements

3.0.1 National Space Launch System Performance Requirements

The National Space Launch System (NSLS) is designed to meet stringent performance requirements that ensure mission success, safety, and reliability.

3.1 General Performance

3.1.1 NSLS Multi-Scenario Performance Requirements

The NSLS must demonstrate a high level of performance across multiple mission scenarios.

3.1.2 Payload Capacity

The NSLS shall provide a minimum payload capacity of 10,000 kg to GTO and 25,000 kg to LEO.

NameStatementStatusMethodChild
1Payload Capacity
The NSLS shall provide a minimum payload capacity of 10,000 kg to GTO...
REVIEWANALYSIS
+1
2Reliability Metrics
The NSLS shall achieve a minimum launch reliability rate of 98%...
REVIEWDEMONSTRATION
3Rapid Deployment Capability
The NSLS shall be designed to support an on-demand launch capability...
REVIEWMODELING
4Weather Constraints
The NSLS shall be capable of launching under a range of weather conditions...
REVIEWTEST

PDF Import

End the Word doc era

Stell enables instant conversion of sizable technical contracts into interactive, structured requirements. No other tool on the market can automatically import and digitize PDF specifications. Save engineers hours of manual work from day one.

Specifications/Crew Vehicle Systems

Crew Vehicle Systems

DRAFT
Apex
Orbit
Zenith
Columns ›Search...
Requirement NameRequirement StatementEvidenceMethodTaskCollab
1Rotational Velocity Limits
The CTS shall provide orthostatic protection to the crewmember with a lower body compression garment from the ankle to the top of the waist...
DEMONSTRATION
TASK3
2Sustained Cross-Coupled Rotational Accel.
The CTS shall provide orthostatic protection to the crewmember with a lower body compression garment from the ankle to the top of the waist...
ANALYSIS
TASK3
+1
3Acceleration Rate of Change
The CTS shall provide orthostatic protection to the crewmember with a lower body compression garment from the ankle to the top of the waist...
Evidence Record
TASK3
4Health Limits for Vibration during Dyn.
The CTS shall provide orthostatic protection to the crewmember with a lower body compression garment from the ankle to the top of the waist...
DEMONSTRATION
TASK3
5Operability of Controls
The CTS shall provide orthostatic protection to the crewmember with a lower body compression garment from the ankle to the top of the waist...
TEST
TASK3
6Annunciator Intelligibility
The CTS shall provide orthostatic protection to the crewmember with a lower body compression garment from the ankle to the top of the waist...
TASK3

Compliance Matrix

Document-to-matrix workflow

Toggle quickly between original documents and a dynamic compliance matrix with Stell's dual-view system. Our platform highlights every requirement and links standards automatically. The powerful text search enables rapid identification of key phrases across specifications.

Specifications/Crew Vehicle Systems

Crew Vehicle Systems

V2DRAFT
Columns ›Search for requirements...
NameStatementComplianceStatusTypeParents
1Rotational Velocity Limits
The CTS shall provide orthostatic protection...
INTEND TO COMPLYDRAFTENVIRONMENTAL
2Sustained Cross-Coupled Rotational
The satellite shall be equipped...
COMPLIANTDRAFTSOFTWARE
+1
3Acceleration Rate of Change
The radiators shall be sized...
INTEND TO COMPLYACTIVEDESIGN
4
5
6
7
8

V&V Tracking

Verification that traces to evidence

Catalog your research and test efforts and link evidence records directly to requirements. Track methods, programs, and compliance cadence — with a complete audit trail baked in.

Specifications/Climate Hardening
E-SAT-01

Climate Hardening

DRAFT
Generate report
TitleMethodComplianceProgramCadenceLinked
ER-001Hot Fire TestTESTCOMPLIANTMEDIUM SATQualification
ER-002Thermal Cycle AnalysisANALYSISINTEND TO COMPLYMEDIUM SATProduction
ER-003Vibration Screening ReportINSPECTIONCOMPLIANTE-SATQualification
+1
ER-004EMI Shielding ValidationDEMONSTRATIONINTEND TO COMPLYMEDIUM SATProduction
ER-005Pressure Vessel IntegrityTESTCOMPLIANTE-SATQualification
New Verification Record
TEST
MEDIUM SAT
Hot Fire Test

Graph View

See how everything connects

Map how your requirements are connected within systems and across programs. Visualize parent-child relationships, trace dependencies, and spot gaps in an interactive graph — no spreadsheet required.

PRG-1130

Thermal Control

DocumentMatrix
NameStatement
Radiator Introduction...
Radiator Panels...
Radiator Size...
CTC-001-00Radiator Introduction
DRAFT

The radiator system shall be monitored at all times remotely.

SYS-004 EVA Operations
SUBSYS_STAR001-1 Angular Resolution
CTC-001-00Radiator Introduction

The radiator system shall be monitored at all times remotely.

Design Specification
SUBSYS_STAR001-3 Field of View

Supplier Portal

Share without the overhead

Share compliance matrices with customers and suppliers directly — no more emails, phone calls, or long meetings. They get read-only access to exactly what they need. Import PDFs, Excel, or Word in one click.

Sharing Portal

Specifications

Search specifications...
Specification NameVersionLevelProductOrganization# ReqsLast EditedCategory
1BHT-600V1LEVEL 1BHT-100Apex12011/20/2025DRAFT
2BHT-600 Spec 2V1LEVEL 1BHT-100Apex6311/20/2025
3Acceleration Rate of ChangeV1LEVEL 1Apex6311/20/2025DRAFT
4Health Limits for VibrationV1LEVEL 1Apex6311/20/2025
5Operability of ControlsV1LEVEL 1Apex6311/20/2025DRAFT
6Annunciator IntelligibilityV1LEVEL 1Apex6311/20/2025

Standards Library

Every standard at your fingertips

Instant access to a shared repository of pre-loaded aerospace and engineering standards. Search, reference, and link standards directly to your requirements — available to all Stell users.

Standards Library

Search standards...
Spec #Name
AC 20-152ADEVELOPMENT ASSURANCE FOR AIRBORNE ELECTRONIC HARDWARE
SMC-S-010TECHNICAL REQUIREMENTS FOR ELECTRONIC PARTS
STD-7150.2DPROCEDURAL REQUIREMENTS: SOFTWARE ENGINEERING
MIL-STD-882EDEPARTMENT OF DEFENSE STANDARD PRACTICE: SYSTEM SAFETY
STD-8739.8BTECHNICAL STANDARD: SOFTWARE ASSURANCE AND SOFTWARE SAFETY
STD-7120.8APROCEDURAL REQUIREMENTS: RESEARCH AND TECHNOLOGY PROGRAM
ECSS-Q-ST-40CSPACE PRODUCT ASSURANCE: SAFETY
MIL-STD-810HENVIRONMENTAL ENGINEERING CONSIDERATIONS AND LABORATORY TESTS
DO-178CSOFTWARE CONSIDERATIONS IN AIRBORNE SYSTEMS AND EQUIPMENT
AS9100DQUALITY MANAGEMENT SYSTEMS FOR AVIATION, SPACE AND DEFENSE

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BOOK A DEMO

Ready to replace Your legacy workflow?

See how Stell turns scattered docs and manual traceability into a single, audit-ready platform - in a 30-minute demo tailored to your program.

BOOK A DEMO

Ready to replace Your legacy workflow?

See how Stell turns scattered docs and manual traceability into a single, audit-ready platform - in a 30-minute demo tailored to your program.