What Is Work In Progress? Meaning, Formula And Examples

Work in progress is the inventory that sits between raw material and finished goods. It is not fully raw anymore, but it is not ready to sell or dispatch either. In many factories, this is where a lot of confusion hides.

A batch may be cut but not machined. Components may be machined but not assembled. Assemblies may be ready but not tested. Goods may be tested but not packed. Each of these stages represents work in progress, often called WIP.

For manufacturers, WIP is more than an accounting term. It tells the owner how much money is locked inside unfinished production, where jobs are stuck, and whether production is moving smoothly.

AICAN Optiwise helps manufacturers connect production, inventory, purchase, sales, and reports so work in progress can be tracked with better visibility instead of depending on manual follow-ups.

Work In Progress Meaning

Work in progress means goods that are currently being manufactured but are not yet finished.

It includes raw materials that have entered the production process, labour and overhead already applied, and partially completed goods waiting for the next operation.

In simple terms, WIP is unfinished production.

Work In Progress Example

Suppose a factory manufactures control panels. Raw sheets are cut, bent, powder coated, assembled, wired, tested, and packed.

If 50 panels are cut and bent but not yet wired, they are work in progress. If 20 panels are assembled but still waiting for testing, they are also WIP. Only after final testing and packing do they become finished goods.

The same idea applies to machining, fabrication, electronics, plastics, chemicals, textiles, furniture, and many other manufacturing setups.

Why WIP Matters

WIP matters because unfinished goods consume money, space, labour, and management attention.

High WIP may indicate that production is busy, but it may also indicate bottlenecks. Material may be stuck before inspection. Jobs may be waiting for one machine. Operators may be working on too many orders at once. A missing component may be holding several batches.

Tracking WIP helps a manufacturer understand:

• how much production is unfinished
• where jobs are stuck
• how much material is locked in process
• whether production flow is balanced
• whether dispatch dates are at risk
• how much cost is already incurred

Without WIP visibility, teams may keep starting new jobs while old jobs remain incomplete.

Work In Progress Formula

A common accounting formula for work in progress is:

Ending WIP = Opening WIP + Manufacturing Costs Added - Cost Of Goods Manufactured

Where:

• Opening WIP is unfinished production at the beginning of the period.
• Manufacturing costs added include raw material, labour, and overhead added during the period.
• Cost of goods manufactured is the cost of items completed during the period.

This formula is useful for accounting, but operations teams also need stage-wise WIP visibility: how many units are at cutting, machining, assembly, testing, packing, and hold.

Businesses should consult their accountant for final valuation methods because WIP valuation can affect financial reporting and tax treatment.

WIP Vs Finished Goods

WIP is unfinished production. Finished goods are ready for sale or dispatch.

A product should not be treated as finished goods until all required production, inspection, and packing steps are complete. If the system shows goods as finished too early, sales and dispatch teams may commit stock that is not truly available.

WIP Vs Raw Material

Raw material is stock that has not yet entered production. WIP is material already issued or consumed into a production process.

This difference matters because once material moves into WIP, it should be linked to a work order, production job, or batch. Otherwise, stores may lose track of where the material went.

Common WIP Problems

The first problem is overproduction. Teams start more jobs than they can finish, creating piles of semi-finished goods.

The second problem is missing stage tracking. The owner knows production is “in process” but not where it is stuck.

The third problem is wrong material issue. Material is issued to production but not linked properly to output.

The fourth problem is hidden rejection. Rejected or rework items stay inside WIP without clear status.

The fifth problem is inaccurate costing. If WIP is not tracked, the business may not know the true cost of unfinished goods.

How To Control WIP

Start with clear work orders. Each job should state quantity, material, process, target date, and responsibility.

Track each major stage. The business does not need overcomplication, but it should know whether a job is pending, running, completed, rejected, or on hold.

Limit unnecessary job starts. A factory should focus on completing priority work, not simply releasing more orders to the floor.

Review bottlenecks regularly. If WIP keeps accumulating before one process, that process needs attention.

Connect WIP with dispatch commitments. If a customer order depends on WIP completion, sales should see realistic status.

How Optiwise Helps

Optiwise by AICAN helps manufacturers connect production activity with inventory and reporting. Material issue, work orders, production output, WIP status, and finished goods movement can be viewed as part of one workflow.

This matters because WIP is not only a production number. It affects purchase planning, inventory valuation, customer delivery, and cash flow.

AICAN builds Optiwise for manufacturing SMEs that need practical visibility into what is happening between order confirmation and dispatch.

Founder’s Note

In many factories, WIP is where promises get stuck. The order is not delayed because nobody worked. It is delayed because nobody saw the bottleneck early enough.

At AICAN, we believe production visibility should not require ten phone calls. AICAN Optiwise helps teams see what is issued, what is running, what is completed, and what still needs attention.

When WIP becomes visible, the factory becomes easier to manage.

FAQs

What is work in progress in manufacturing?

Work in progress is unfinished production. It includes goods that have entered manufacturing but are not yet completed or ready for dispatch.

Is WIP an asset?

Yes, work in progress is generally treated as inventory and appears as an asset in accounting records, subject to proper valuation by the business and its accountant.

What is the WIP formula?

A common formula is: Ending WIP = Opening WIP + Manufacturing Costs Added - Cost Of Goods Manufactured.

Why is high WIP a problem?

High WIP can indicate bottlenecks, overproduction, blocked working capital, delayed dispatches, and poor production flow.

How does Optiwise help with WIP?

Optiwise by AICAN helps manufacturers connect work orders, inventory issue, production status, finished goods, and reports for better WIP visibility.