Accurate inventory is essential for efficient warehouse operations. Stockouts, overstocking, fulfilment errors, unnecessary costs and poor customer experiences can be faced by businesses when the actual count in the stock does not match with the quantity in the system.
Inventory reconciliation can be done systematically by conducting an inventory audit, which helps in identifying these discrepancies and enhancing inventory management. An audit is not all about product counts but rather is a comparison of the actual stock levels against the stock records, an investigation of the discrepancies and an opportunity to identify the issues that may have caused the discrepancies.
What is an Inventory Audit?
An inventory audit is the process of verifying a company's inventory records against the actual stock physically available in the warehouse.
The process can identify issues such as:
- Missing or excess inventory
- Incorrect stock entries
- Damaged or obsolete products
- Unrecorded stock movements
- Receiving or picking errors
- Unauthorized inventory movement
The goal is that physical inventory and system records are as accurate and consistent as possible.
Inventory Audit Checklist
Use a structured checklist to help ensure a reliable and repeatable inventory audit.
1. Define the Audit Scope
Identify warehouse, warehouse locations, SKU and/or inventory categories to be audited and purpose of the audit.
2. Prepare Inventory Records
Make sure that the most up to date stock data is accessible through the WMS, ERP or stock management system.
3. Organize the Warehouse
Products must be kept in their appropriate areas and labeled appropriately. Damaged, obsolete or unidentified inventory should be separated where possible.
4. Schedule the Audit
Select a time that will be least disruptive to receiving, picking, fulfilment and shipping operations.
5. Record Physical Counts
Count, confirm and record inventory using the same procedure.
6. Investigate Variances
When physical stock differs from system records, identify the cause instead of simply changing the recorded quantity.
Types of Inventory Audits
Different audit approaches can be used depending on inventory volume, warehouse operations and business requirements.
1. Physical Inventory Count
The physical inventory count includes physically verifying the stock level of the warehouse and reconciling it with the inventory level on the books.
It offers a detailed picture of real stock, but can be time-consuming and labour-intensive, particularly in warehouses with thousands of SKUs.
2. ABC Analysis
ABC analysis is a method of inventory classification which rates the items according to a criterion like value, importance or movement.
- Class A: High-value or high-priority items
- Class B: Medium-value items
- Class C: Lower-value items
This provides businesses a chance to allocate more resources to auditing items with a greater financial or operational influence.
3. Cut-Off Analysis
Cut-off analysis controls inventory movement during an audit so that goods are not accidentally counted twice or missed. Receiving or dispatch or in-house movements may be temporarily restricted for a defined period until the count is done.
4. Freight and Inventory Movement Review
In addition, businesses can check the inventory flow between stores to detect potential damage, loss or discrepancies during shipment and inventory handling.
How to Conduct an Inventory Audit
A practical inventory audit can have three stages.
1. Prepare and Plan
Prepare the warehouse before counting. Recognize products that are damaged, redundant, obsolete or slow moving and make sure the audit team knows what needs to be done.
The business should also decide on the type of audit and agree on a time for conducting the audit, when it can be conducted with minimum disruption.
2. Execute the Audit
Carry out the selected counting or verification method consistently.
This can be a complete physical count, ABC counting or an audit method that is used to determine the warehouse's stock.
Manual recording can be minimized and inventory verification can be more efficient with the use of technologies such as barcode scanning and RFID.
3. Analyze and Reconcile
Compare physical with system results. If a variance is discovered, look at the root cause of the variance.
Common reasons include:
- Receiving errors
- Picking mistakes
- Unrecorded transfers
- Damaged or discarded goods
- Incorrect adjustments
- Misplaced inventory
Having identified the cause, the inventory record can be corrected and preventive action can be taken.
Inventory Cycle Count: Supporting Inventory Accuracy
Inventory cycle count means to verify smaller amounts of inventory on a regular basis rather than the entire inventory in the warehouse at once.
Businesses can daily, weekly or monthly count selected products or locations according to their value, activity or operational significance.
A cycle counting system will provide increased visibility to inventory accuracy and less disruption to the system than a full physical inventory would, especially when it comes to frequency.
For instance, high value items of class A can be counted more often and lower priority items checked less often.
Physical Count vs Cycle Count
| Factor | Physical Inventory Count | Cycle Count |
|---|---|---|
Coverage | Complete or broad | Selected inventory |
Frequency | Periodic | Regular and ongoing |
Disruption | Higher | Lower |
Resource requirement | Concentrated | Spread over time |
Cycle counting should be viewed as a complementary inventory-control practice rather than necessarily a replacement for comprehensive audits.
Benefits of Regular Inventory Audits
Improves Inventory Accuracy
Periodic audits help to keep physical stock and system records in sync.
Identifies Shrinkage
Any unexpected difference will show up the theft, damage, misplaced or process problem.
Helps to minimize stockouts and overstocking
Accurate and accurate stock information helps to make more informed stock replenishment decisions and minimise over- or under-stocking.
Improves Order Fulfilment
Stock records enable warehouse staff to quickly find and ship the right product.
Determines Damaged and Obsolete Inventory
Inventories can be identified during an audit as being damaged, expired or not appropriate for sale.
Improves Operational Efficiency
Driven by accurate inventory data, better fulfilment, purchasing, replenishment and warehouse planning.
Common Challenges in Inventory Auditing
Time and Labour
Physical auditing, especially during full physical audits, can be time-consuming to count large quantities of inventory.
Human Errors
Manual counting, data entry and product identification may result in errors. They can be reduced by having clear procedures, training and scanning technology.
Operational Disruption
If inventory movement is not controlled well, full Physical counts could cause disruption in Receiving, Picking and Shipping activities. From this disruption, cycle counting may help alleviate.
Best Practices for Inventory Auditing
1. Maintain accurate inventory records
Ensure WMS, ERP and inventory records are kept up to date to compare with reliable data.
2. Make the process for auditing consistent.
Follow the same processes for counting, documenting, investigating and reconciling variances.
3. Use appropriate counting frequencies
Use cycle counting as appropriate and take comprehensive counts every now and then.
4. Use barcode and RFID technology
Scanning solutions can cut down on manual data entry and boost inventory visibility.
5. Investigate root causes
Do not treat discrepancies as numbers that simply need correction. Identify the process issue that caused them.
6. Keep inventory organized
Audits are easy and reliable if areas are cleared, labels are accurate and damaged and obsolete items are separated.
7. Train warehouse teams
Staff should be familiar with inventory management practices and the tools available to track inventory.
When Should You Use Inventory Audits and Cycle Counts?
A complete audit can be especially helpful if stock records are no longer reliable, if large discrepancies have been suspected, if there has been a change in stock management in the warehouse or if a business wants a more in-depth verification of stock.
Cycle counting works well for continuous inventory accuracy, when companies wish to audit smaller sections of inventory without causing major disruptions to their day-to-day workflow.
Many businesses will find the best combination to be to use both methods, cycle counting as a regular part of inventory management and more extensive audits on a regular basis.
Role of Technology in Inventory Auditing
A Warehouse Management System (WMS) can offer details regarding quantity of stock, its location and movement. This information can be integrated with a purchasing process or other business activities using ERP and inventory management software.
Depending on the warehouse environment, barcode scanners may be easier for identifying and counting products while RFID may offer an additional inventory tracking solution.
Technology assists the audit, but good processes, people and investigation of discrepancies are still key.
Conclusion
An inventory audit is more than just a counting exercise. A systematic procedure for reconciling physical stock with the recorded inventory, detecting discrepancies and improving the inventory control processes.
Conducting regular audits can help to increase inventory accuracy, minimise loss, aid better replenishment decisions and enhance order fulfilment.
Inventory cycle counting can be a useful method for providing businesses with constant inventory visibility without interrupting daily operations. The key elements of an effective inventory management system are accurate records, a well-organized warehouse workflow, periodic checks and trained staff and technology.
