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Approvals are part of almost every business process. Whether you’re signing off on purchase requests, marketing campaigns, expense claims, contracts, or hiring decisions, the way approvals move through your organization directly impacts productivity. Yet many businesses still rely on approval methods that don’t match the complexity or urgency of the task.
The good news? Selecting the right approval workflow can eliminate bottlenecks, improve collaboration, and accelerate decision-making. The two most common approaches are parallel and sequential approval workflows. Each has unique strengths and understanding when to use each can significantly improve workflow management across your organization.
Why Your Approval Workflow Matters More Than You Think
An approval workflow defines the path a request follows before receiving final authorization. When designed correctly, it reduces confusion, speeds up decisions, and creates a transparent audit trail. When designed poorly, it leads to unnecessary delays, missed deadlines, duplicate reviews, and frustrated employees.
As businesses embrace digital transformation, choosing the right approval model becomes even more important. Instead of relying on emails and manual follow-ups, organizations are increasingly using approval process automation to ensure every request reaches the right people at the right time.
Sequential Approval Workflow: Best for Control and Compliance
A sequential approval workflow follows a fixed order. One approver reviews the request first, and only after approval does it move to the next person. If anyone rejects the request, the process usually stops until changes are made.
This approach works well when each reviewer depends on the previous decision or when approvals must follow a strict chain of authority.
Common examples include:
- Purchase order approvals
- Financial expense approvals
- Legal contract reviews
- Regulatory compliance processes
The biggest advantage is accountability. Every approval is documented in order, making audits easier and reducing the risk of skipped reviews. Teams handling sensitive information also benefit because every decision follows established governance policies.
The trade-off, however, is speed. If one approver is unavailable, the entire process pauses, creating delays that can affect project timelines.
Parallel Approval Workflow for Faster Workflow Management
Unlike sequential approvals, a parallel workflow sends requests to multiple approvers simultaneously. Each reviewer works independently, allowing decisions to happen at the same time instead of waiting in line.
This model is ideal when approvals are independent of one another.
Examples include:
- Marketing campaign reviews
- Product launch approvals
- HR onboarding requests
- Cross-functional project sign-offs
Because several people review requests simultaneously, approval cycles become significantly shorter. Teams collaborate more effectively while maintaining visibility into each approval status.
Parallel approvals are especially valuable for organizations focused on workflow optimization, where reducing wait times directly improves operational efficiency. However, they require clear approval rules to prevent conflicting feedback or inconsistent decisions.
Quick Tip: Don’t Think It’s Either-Or
Many successful organizations combine both workflows.
For example, a purchase request may first require parallel approvals from Finance and IT. Once both approvals are complete, it automatically moves to the CFO for a sequential final approval. This hybrid approach balances speed with accountability.
Parallel vs. Sequential: Which Workflow Fits Your Business?
There isn’t a universal winner because every approval process has different priorities.
Choose sequential approvals when:
- Approval order matters.
- Compliance is critical.
- Decisions depend on previous reviewers.
- Clear accountability is required.
Choose parallel approvals when:
- Multiple reviewers can work independently.
- Speed is a priority.
- Teams span multiple departments.
- Delays create business risks.
Many organizations adopt both models depending on the specific process. The key is matching the workflow to the business objective rather than forcing every request through the same approval path.
Choosing the Right Model with Workflow Optimization
Before designing an approval process, ask a few simple questions:
- Does the approval need a specific sequence?
- Can reviewers evaluate requests independently?
- How many stakeholders are involved?
- Are compliance or audit requirements strict?
- How quickly does the decision need to happen?
Answering these questions helps businesses create approval of workflows that reduce unnecessary waiting while maintaining governance.
Modern organizations also rely on workflow orchestration to connect approvals with related tasks, notifications, and downstream processes. Instead of treating approvals as isolated events, workflow orchestration ensures every completed approval automatically triggers the next business action.
Automating Approvals Through Business Process Automation
Manual approvals often involve emails, spreadsheets, phone calls, and constant reminders. These repetitive tasks consume valuable time and increase the chance of errors.
That’s why organizations are investing in business process automation to streamline approvals from start to finish.
With approval process automation, businesses can:
- Route requests automatically.
- Send instant notifications.
- Escalate overdue approvals.
- Track every approval in real time.
- Maintain complete audit logs.
- Monitor approval performance through dashboards.
Automation supports both sequential and parallel workflows while giving managers greater visibility into every stage of the process.
Platforms designed for Enterprise workflow management also integrate approvals across departments, ensuring finance, HR, procurement, operations, and legal teams of work from a unified system. This creates consistency, improves compliance, and supports scalable growth.
Combined with Business process management (BPM) practices, automated approval workflows continuously improve over time by identifying bottlenecks, measuring performance, and refining approval paths.
Conclusion
Choosing between parallel and sequential approval of workflows isn’t about finding the “better” option—it’s about selecting the right one for each business process.
Sequential workflows provide stronger control, accountability, and compliance, while parallel workflows deliver faster decisions and improved collaboration. Many organizations achieve the best results by combining both approaches into hybrid approval models.
As businesses continue their digital transformation journey, automating approvals becomes more than a productivity improvement—it becomes a competitive advantage. By combining intelligent approval of workflows with business process automation, workflow orchestration, and enterprise workflow management, organizations can make faster decisions, reduce delays, and build more agile operations that scale with future growth.
