Approval workflow and the approval matrix
An approval workflow is the set of rules that decides who must sign off on a purchase before it can proceed — and the approval matrix is the map that defines those rules by role and spend band. Together they are procurement's core financial control: the mechanism that keeps spend within authority, protects budgets and creates accountability. This guide explains what an approval workflow and approval matrix are, how delegation of authority works, and how to design a workflow that controls spend without slowing the business down.
9 min read · Last updated 11 July 2026 · By Lapasar Procurement Technology
In short
An approval workflow is the defined routing that sends a purchase request to the right people for sign-off before it proceeds. An approval matrix (or delegation of authority) is the table that sets who can approve what, usually by role and spend threshold. Together they ensure every purchase is authorised by someone with the right authority before money is committed.
What is an approval workflow and approval matrix?
An approval workflow is the defined path a purchase request takes to get authorised. When a requisition is raised, the workflow routes it to the person — or sequence of people — who must approve it before it can become a purchase order. The workflow encodes the organisation's rules about who is allowed to authorise which purchases.
The approval matrix is the table those rules are drawn from. Often called a delegation of authority (DoA), it maps approval limits to roles and spend bands: a team lead might approve up to one threshold, a department head up to a higher one, and finance or the board above that. It can also vary by category, so certain purchases need specialist sign-off regardless of value.
Together, the matrix defines the rules and the workflow applies them. The matrix says 'a purchase of this size in this category needs these approvers'; the workflow makes sure the request actually reaches them, in order, before anything is committed.
How approval workflows work
An approval workflow turns the approval matrix into automatic routing, so the right people are asked to sign off without anyone having to remember the rules.
- Define the matrix: set approval thresholds and required approvers by role, spend band and category.
- Trigger on a request: when a requisition is raised, the workflow reads its value and category.
- Route to approvers: it sends the request to the correct approver(s) in the right sequence.
- Notify and remind: approvers are alerted, with reminders and escalation if a request stalls.
- Record the decision: each approval, rejection or query is logged with who, when and why.
- Release downstream: once fully approved, the request converts into a purchase order.
Why approval workflows matter
Approval workflows are how an organisation enforces financial control at the point of spend. Without them, purchases can be committed by people without the authority to do so, budgets can be breached, and there is no record of who approved what. A clear matrix and an enforced workflow ensure every purchase is authorised by the right person before money is committed — the foundation of spend governance and audit.
But control has a cost if it is clumsy. Manual, email-based approvals stall on desks, are easy to bypass and slow the business down, which pushes frustrated staff toward maverick buying. The aim is control that is fast: automated routing that reaches the right approver instantly, escalates when it stalls, and gets out of the way for low-value, on-catalogue purchases. Well-designed workflows make the compliant path the quick path — which is the surest way to keep spend both controlled and moving. The approval workflow cost calculator linked below helps quantify what manual approvals are costing you today.
Benefits
Enforced spend authority
Every purchase is authorised by someone with the right delegated authority before it proceeds.
Budget protection
Approvals at the right level stop spend that would breach a budget or bypass governance.
Clear accountability
Each decision is logged with who approved what and when, creating a clean audit trail.
Faster, consistent sign-off
Automated routing reaches the right approver instantly and applies the rules uniformly every time.
Less maverick buying
When the approved path is fast, staff use it instead of buying around the process.
Common challenges
Approval bottlenecks
Requests pile up when a key approver is unavailable and there is no delegation or escalation.
Too many approval layers
Excessive sign-offs slow everything down and dilute accountability without adding real control.
Manual, email-based routing
Approvals over email are slow, easy to lose and hard to audit.
An out-of-date matrix
When roles change but the matrix does not, requests route to the wrong or departed people.
Approval workflow in practice
A company's approval matrix might let a team lead approve routine purchases up to a modest threshold, require a department head above that, and bring in finance for larger commitments — with IT sign-off on any technology purchase regardless of value. When a manager raises a requisition, the workflow reads the value and category and routes it automatically: small catalogue orders clear at team-lead level in minutes, while a larger purchase steps up through the department head and finance, each decision logged.
The design goal is proportionate control. Low-value, on-catalogue buys should flow with light-touch approval so the business is not slowed; larger or unusual spend should attract more scrutiny. Malaysian organisations that run approvals through a managed procurement platform get this automatically — thresholds and routing applied consistently, with escalation when a request stalls — so control tightens without creating bottlenecks. The approval matrix template linked below is a ready starting point for defining your own thresholds.
Best practices
Base the workflow on a clear matrix
Define approval limits by role, spend band and category first, then let the workflow apply them.
Right-size the layers
Use the fewest approval steps that give real control — every extra layer adds delay, not safety.
Automate routing and escalation
Route requests automatically and escalate stalled ones so approvals never sit idle.
Provide for delegation
Let approvers delegate when away so absence never becomes a bottleneck.
Keep the matrix current
Review it as roles and thresholds change so requests always reach the right people.
Log every decision
Record who approved what and when to maintain a clean, auditable trail.
Summary
An approval workflow routes a purchase request to the right people for sign-off, and the approval matrix — the delegation of authority — defines who can approve what by role, spend band and category. Together they are procurement's core financial control, ensuring every purchase is authorised before money is committed.
The art is proportionate control: automated routing that clears low-value catalogue buys quickly and applies more scrutiny to larger spend, with delegation and escalation so nothing stalls. Well-designed workflows make the compliant path the fast path, keeping spend controlled and moving at once.
Key takeaways
- The approval matrix sets the rules; the workflow applies them automatically.
- Delegation of authority maps approval limits to roles and spend bands.
- Every purchase should be authorised before money is committed.
- Too many layers slow the business and dilute accountability.
- Fast, automated approval is the best defence against maverick buying.
Frequently asked questions
- What is a procurement approval workflow?
- A procurement approval workflow is the defined routing that sends a purchase request to the right people for sign-off before it can proceed to a purchase order. It applies the organisation's rules about who may authorise which purchases, so every commitment is approved by someone with the appropriate authority.
- What is an approval matrix?
- An approval matrix — also called a delegation of authority (DoA) — is a table that sets who can approve what, typically by role and spend threshold, and sometimes by category. It defines, for example, that a team lead can approve up to one limit, a department head up to a higher one, and finance above that. The workflow then routes requests according to this matrix.
- What is delegation of authority in procurement?
- Delegation of authority is the formal assignment of approval limits to roles — the rules that say how much each role can authorise and for what. It is the basis of the approval matrix, ensuring purchases are approved at a level appropriate to their value and risk rather than by whoever happens to be available.
- How do you design an approval workflow that doesn't slow the business?
- Base it on a clear matrix, use the fewest approval layers that give real control, and automate routing so requests reach approvers instantly. Let low-value, on-catalogue purchases clear with light-touch approval, apply more scrutiny to larger spend, and build in delegation and escalation so absences never create bottlenecks. Fast, proportionate control keeps staff on the compliant path.
- How does Lapasar help with approval workflows?
- Lapasar applies your approval thresholds and routing automatically as part of the requisition-to-PO flow, with escalation when a request stalls, so control is consistent and fast across Peninsular Malaysia. Low-value catalogue buys clear quickly while larger spend attracts more scrutiny. See the approval matrix template and the approval workflow cost calculator linked below.
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