Functional Requirements
Order Processing:

How will orders be created, edited, and deleted?
What information needs to be captured for each order (e.g., customer details, product details, payment information)?
How will the system handle different order statuses (e.g., pending, confirmed, shipped, delivered, canceled)?
Inventory Management:

How will the system track inventory levels?
What processes will be in place for updating inventory when an order is placed or canceled?
How will the system handle low stock or out-of-stock situations?
Customer Management:

How will customer information be stored and managed?
Will customers have accounts, and if so, what information will they be able to manage themselves?
How will customer service interactions be logged and managed?
Payment Processing:

What payment methods will the system support (e.g., credit card, PayPal, bank transfer)?
How will payment statuses be tracked and updated?
How will refunds and returns be handled?
Shipping and Delivery:

How will shipping options be managed and displayed to customers?
How will shipping statuses be tracked and updated?
What integrations are needed with shipping carriers?
Reporting and Analytics:

What types of reports will be needed (e.g., sales reports, inventory reports, customer reports)?
How will data be visualized and presented to users?
How often will reports be generated, and who will have access to them?
Technical Requirements
System Architecture:

What will be the overall architecture of the system (e.g., monolithic, microservices)?
What programming languages and frameworks will be used?
How will the system ensure scalability and performance?
Database Design:

What database management system will be used (e.g., SQL, NoSQL)?
How will data relationships be managed (e.g., customers, orders, products)?
What strategies will be used for database indexing and optimization?
Security:

How will user authentication and authorization be handled?
What measures will be taken to protect sensitive data (e.g., encryption, secure storage)?
How will the system be protected against common security threats (e.g., SQL injection, cross-site scripting)?
Integration and APIs:

What third-party systems will the order management system need to integrate with (e.g., payment gateways, shipping carriers)?
How will these integrations be managed and maintained?
Will there be a need for a public API for external developers?
User Interface and Experience:

How will the user interface be designed for different user roles (e.g., customers, admins, support staff)?
What considerations will be made for mobile and desktop usability?
How will accessibility be ensured?
Project Management
Project Timeline:

What are the key milestones and deliverables for the project?
What is the estimated timeline for each phase of development?
How will progress be tracked and communicated?
Resource Allocation:

What team members and roles will be required for the project?
How will tasks be assigned and managed?
What tools and technologies will be used for project management?
Testing and Quality Assurance:

What testing strategies will be used (e.g., unit testing, integration testing, user acceptance testing)?
How will bugs and issues be tracked and resolved?
What criteria will be used to determine when the system is ready for deployment?
Deployment and Maintenance:

What is the plan for deploying the system to production?
How will the system be monitored and maintained post-deployment?
What is the strategy for handling updates and new features?
Additional Considerations
Legal and Compliance:

What legal and regulatory requirements need to be considered (e.g., GDPR, PCI-DSS)?
How will the system ensure compliance with these requirements?
User Training and Support:

What training materials and resources will be provided to users?
How will user support be handled (e.g., helpdesk, documentation)?
Scalability and Performance:

What strategies will be implemented to ensure the system can scale with increased demand?
How will performance be monitored and optimized?
Backup and Recovery:

What is the plan for data backup and disaster recovery?
How will data integrity and availability be ensured?
These questions should help guide the planning and development of a comprehensive order management system software.