Indirect spend covers everything a company buys that does not go into the product or service it sells. Office supplies, facilities maintenance, lab consumables, IT peripherals, professional memberships, training, and travel. MRO (maintenance, repair, and operations) sits within indirect and specifically covers the items needed to keep operations running.
These categories share characteristics that make them ideal for blanket POs: high transaction volume, low to moderate per transaction value, predictable usage patterns, and limited supplier counts within each subcategory. A company might process thousands of office supply orders per year across the same three suppliers.
Without blankets, each transaction generates a standard PO and the procurement overhead becomes prohibitive. With blankets configured well, the procurement load drops dramatically while maintaining appropriate controls.
Why Indirect and MRO Fit Blankets Well
Three characteristics align with the blanket structure.
High frequency, low value transactions
A single facility might consume hundreds of small orders per month across cleaning supplies, light maintenance, safety equipment, and office consumables. Processing each one as a standard PO consumes more administrative cost than the order itself. The blanket compresses this.
Stable supplier relationships
Most indirect categories have a small number of preferred suppliers per subcategory. Office supplies often go through one or two major distributors. MRO parts come from a small list of distributors with overlapping catalogs. The supplier concentration supports blanket structures.
Predictable annual demand
Indirect demand correlates with operational activity (headcount, facility size, production volume) in ways that make annual sizing reasonably accurate. The blanket limit can be set with confidence based on the prior year plus expected changes.
Categories That Work Well
Five indirect categories are the most common blanket candidates.
Office supplies
Paper, toner, pens, folders, small office equipment. Often consolidated to one or two major suppliers with online catalog access. The blanket limit covers annual category spend; releases are typically initiated by office managers or administrative staff.
Facilities and janitorial
Cleaning supplies, paper products, light bulbs, HVAC filters, basic maintenance supplies. Often handled by a single facilities supplier per location. The blanket limit covers the year of recurring facilities consumption.
Laboratory consumables
For companies with lab operations, consumables (chemicals, glassware, gloves, PPE, sample containers) often flow through a small set of specialized distributors. Blanket structures handle the recurring orders efficiently.
IT peripherals and accessories
Keyboards, mice, cables, monitors, laptop accessories, presentation equipment. Standardized through one or two IT distributors. Often integrated with IT helpdesk systems that generate release requests automatically when employees request equipment.
MRO parts for production environments
For manufacturing, distribution, and service operations, MRO parts are the most spend intensive indirect category. Bearings, fasteners, electrical components, hydraulic parts, safety equipment. Often spread across multiple specialized suppliers with overlapping catalogs.
Setting Up Indirect Blankets by Category vs by Vendor
Two structural choices, with different tradeoffs.
Category based blankets
One blanket per category, with the supplier specified. Office Supplies, $200K annual limit, Supplier A. Facilities, $150K annual limit, Supplier B. Lab Consumables, $300K annual limit, Supplier C.
This works when each category has a single preferred supplier. The category structure makes spend reporting clean and the limit setting straightforward.
Vendor based blankets
One blanket per major supplier, covering all categories that supplier provides. Supplier A, $400K limit, covering office supplies and small electronics. Supplier B, $200K limit, covering facilities and janitorial.
This works when suppliers cover multiple categories and the buying patterns are integrated. Some MRO distributors carry both production parts and office supplies, making a vendor based blanket more natural than two category blankets.
Choosing between them
The right choice depends on the supplier landscape. If categories map cleanly to suppliers (one supplier per category), category based blankets work well. If suppliers span categories, vendor based blankets reduce administrative overhead while sacrificing some category level reporting cleanliness.
Approval Delegation for Low Value Releases
The control benefit of indirect blankets only emerges if the release approval is calibrated to the low value, high frequency nature of indirect spend. Treating a $40 office supply order with the same approval rigor as a $40K capital purchase defeats the efficiency benefit.
Auto approval below a threshold
Releases below a defined threshold (often $500 to $2,000 for indirect categories) should auto approve provided they meet the basic checks: from an authorized requestor, within the blanket scope, against an active blanket with sufficient headroom.
Manager approval mid range
Mid range releases (above the auto threshold but below a meaningful budget impact threshold) route to the requestor's manager. Quick approval, focused on whether the order is intended and consistent with department needs.
Procurement review for larger releases
Larger releases against indirect blankets (say, above $10K) should still route through procurement, even though they fall under an approved blanket. The release size is meaningful enough to warrant review of whether this is the right product, the right quantity, and the right time.
Integration With Procurement Cards
Many indirect transactions historically flow through procurement cards (P cards) rather than through PO systems. P cards have their own advantages: faster payment, no PO administrative load, easier vendor onboarding for one off purchases. But they also have weaker controls: cardholder spending is reconciled after the fact rather than authorized before purchase.
Indirect blankets and P cards are not mutually exclusive. A reasonable structure uses blankets for the major recurring suppliers and P cards for the long tail of one off purchases.
The integration question is the boundary. Above what threshold or what frequency does a recurring P card vendor warrant promotion to a blanket structure? The reasonable rule of thumb: any vendor receiving more than $20K to $30K annually through P cards is probably worth a blanket. The threshold tradeoff is between the administrative cost of setting up the blanket and the control benefit of moving the spend to authorized PO flow.
MRO Specific Challenges
MRO has a few wrinkles beyond standard indirect spend.
Parts catalogs and SKU level pricing
MRO suppliers typically offer access to extensive parts catalogs with thousands of SKUs. The blanket should reference the catalog or price list rather than enumerating every item. This requires the matching engine to validate invoice prices against the catalog at the SKU level.
Just in time needs
MRO needs are often urgent: a piece of equipment breaks down and parts are needed immediately. The release workflow needs to support fast turnaround for urgent orders without bypassing controls entirely. Emergency release procedures, with appropriate documentation, are part of MRO blanket design.
Inventory replenishment vs ad hoc
Some MRO blankets feed inventory replenishment systems where items are ordered when stock reaches a reorder point. These releases can be automated. Other MRO spend is ad hoc for unforeseen repairs and needs manual release. The blanket can support both, but the workflow design needs to distinguish between them.
Start Here
Map your top 20 indirect suppliers by annual spend. Note which are currently on blanket structures and which are being processed through standard POs or P cards. Suppliers above $30K annual spend without a blanket are the highest leverage candidates for the next round of blanket setup.
Start with one or two pilot blankets in straightforward categories (office supplies, facilities). Get the release workflow, approval tiers, and consumption tracking right at small scale before extending to MRO and more complex categories.
