How to Streamline Inventory Across Raw Material, WIP, and Finished Goods

Inventory decisions rarely fail because of poor intent. They fail because they are made in isolation.

• Raw material is procured to secure supply.
• Production is scheduled to maximise utilisation.
• Finished goods are stocked to protect service levels.

Each decision makes sense on its own. Together, they create excess inventory, longer lead times, and avoidable pressure on working capital.

In 2023–24, Maruti Suzuki adjusted production to bring dealer inventory and work-in-progress back in line with demand. This was not a reaction to falling sales, nor a short-term cost move. It was a deliberate attempt to correct inventory imbalance across the system.

Instead of treating inventory as a series of isolated controls, we look at it as a flow problem—and show how Indian manufacturers can streamline decisions across raw material, WIP, and finished goods without over-engineering or expensive systems.

Understanding Inventory as a Continuous Flow

A procurement team places a one-month bulk order because a supplier enforces a minimum order quantity.

That single decision sets off a chain reaction across the system.

Procurement → Production (WIP) → Finished Goods → Sales & Cash

The excess material doesn’t sit quietly in “raw inventory.” It stretches production queues, increases WIP aging, pushes finished goods further out of sync with demand—and delays cash recovery.

Inventory does not operate as three independent buckets (raw, WIP, finished goods). It behaves as one continuous flow, where delays and batching in one stage compound downstream.

Optimising each stock in isolation hides the real cost: longer lead times, slower turns, and capital locked deeper into the cycle.

Flow lens vs. silo lens

• The silo view asks: “Is procurement cost-efficient?”
• The flow view asks: “How does this purchase affect cycle time from cash out to cash in?”

That shift is critical. Once inventory is framed as flow, lead times, batch sizes, and supplier cadence must be evaluated together, not locally optimised.

Where Inventory Breakdown Typically Happens in Indian Companies

Inventory issues in Indian manufacturing often appear in three predictable stages: raw material, WIP, and finished goods. Understanding these failure modes allows companies to self-diagnose and prioritise interventions.

#1 Raw Material Stage

Long and variable supplier lead times and low planning discipline cause excess raw stock in Indian firms.

Suppliers in India frequently quote 4–8 week lead times for specialized components. Less than 35% of MSMEs use ERP/planning tools (NASSCOM & MSME Ministry 2024), showing that this problem is systemic, not anecdotal.

Takeaway:

Firms can reduce excess stock by collaborating with suppliers via VMI or consignment models, or by shortening lot sizes and ordering more frequently.

#2 WIP Stage

Overproduction and unmonitored WIP hide bottlenecks and reduce flow efficiency.

Maruti Suzuki flexed production in 2024 to manage WIP, reducing units from 5,000 → 2,000 per line, shortening lead times by 15% and cutting rework by 10%. This demonstrates that WIP can be actively managed instead of left as a buffer.

Takeaway:

Set station-level WIP limits, track flow times, and trial small-batch production to align WIP with downstream capacity.

#3 Finished Goods Stage

Finished goods inventory piles up due to forecast mismatches and channel distortions.

Britannia’s FY 2023–24 near-market distribution model reduced inventory days on hand in biscuits. Amul’s cold-chain decentralisation reduced spoilage in dairy. These examples show that aligning production and distribution with real demand reduces finished-goods congestion.

Automotive dealers often hold FG for 40–60 days; in FMCG, slow-moving inventory in seasonal categories is common. These numbers show the scale of the problem in India.

Takeaway:

Rationalise FG inventory via better forecasting, direct distribution, and incentive alignment.

A Stage-Wise Framework to Streamline Inventory Flow

Inventory problems don’t happen at once, they build up at each stage of the flow. This framework breaks inventory management into clear stages, showing where capital gets stuck and what to fix, step by step, without disrupting production or sales.

Streamlining Raw Material Inventory

Raw material often ties up the largest share of working capital. In India, long supplier lead times and large minimum orders force firms to hold extra stock, which slows production flow and increases WIP queues.

Common Challenges:

• Long / variable supplier lead times push firms to overstock.
• Low digital planning adoption among MSMEs leads to reactive procurement.
• Large MOQs block cash and WIP flow.

Strategies to Streamline Raw Material Inventory: 

 

Strategy	How it Works / Impact
Vendor-Managed Inventory (VMI)	Supplier manages replenishment, reducing raw stock and keeping production flow smooth.
Consignment Stock	Material is on-site but supplier-owned, freeing working capital without disrupting supply.
Smaller, Frequent Orders	Breaks large MOQs into smaller lots, lowering raw stock and WIP queues.
Lead Time Coordination	Aligns procurement with supplier rhythms to prevent excess buffers and idle inventory.

Aligning procurement with production flow, supported by supplier collaboration and smarter order sizing, frees cash and ensures raw material doesn’t block WIP or finished goods flow.

Controlling and Reducing WIP Without Slowing Production

WIP is often misunderstood in Indian plants. It is treated as a safety buffer to keep machines running, when in reality it is a signal of imbalance between stations. Excess WIP does not protect throughput, it lengthens cycle time, hides bottlenecks, and delays cash.

Where WIP typically goes wrong:

• Production is pushed to maximise utilisation, not flow.
• No explicit WIP limits exist at station or line level.
• Cycle time is not tracked as a primary operational metric.

In 2024, Maruti Suzuki publicly adjusted production schedules to reduce both plant-level WIP and dealer inventory. This was not a demand collapse response. It was a deliberate throttling of output to rebalance flow across suppliers, plants, and dealers. Instead of letting WIP accumulate as a buffer, production was flexed to restore rhythm. The result was tighter control over in-plant inventory without shutting lines or sacrificing throughput discipline.

This approach aligns with lean and Theory of Constraints principles: WIP reflects unresolved constraints. Reducing it forces bottlenecks to surface, making them manageable.

To operationalise this, firms need simple, visible controls rather than complex systems.

Core metrics to manage WIP (plant-floor practical):

• WIP per station
• Average cycle time per station
• Queue length before bottleneck operations

A simple relationship worth tracking:

Average Cycle Time ≈ WIP ÷ Throughput

When WIP rises without throughput improving, cycle time expands, this is the early warning signal most plants ignore.

Sample WIP control dashboard (Figurative): 

Station	WIP Limit	Current WIP	Avg Cycle Time
Machining	400 units	620 units	3.8 days
Assembly	300 units	290 units	2.1 days
Testing	200 units	360 units	4.5 days

This view immediately shows where flow is breaking, without any forecasting or ERP complexity.

WIP should be actively controlled, not tolerated. When firms treat it as a signal and apply simple limits, metrics, and small-batch experiments, production flow improves without slowing output.

Rationalising Finished Goods Inventory

Finished goods inventory rarely accumulates because production is careless. It accumulates because sales velocity, channel behaviour, and production decisions are misaligned. When FG is treated as insurance against uncertainty, it becomes the slowest-moving and most expensive inventory in the system.

Where FG typically goes wrong:

• Production is planned on optimistic forecasts rather than real sales velocity.
• SKU proliferation spreads volume thin and inflates slow-moving stock.
• Channel incentives encourage stockpiling while returns remain poorly controlled.

Britannia’s FY 2023–24 disclosures highlight a deliberate shift toward near-market and direct distribution, particularly in rural and semi-urban areas. By shortening distribution layers, the company reduced time-to-shelf and lowered finished goods days without sacrificing availability. The key move was not higher production accuracy, it was faster alignment between factory output and retail pull.

The case shows that FG rationalisation improves when firms reduce distance, physical and informational, between production and consumption.

Finished goods inventory is a mirror of demand alignment. Firms that shorten distribution paths, control SKU sprawl, and align channel incentives reduce FG days without compromising service levels.

Final Takeaway

Excess WIP and bloated finished goods are not operational inconveniences. They are capital traps.

When inventory rises:

• Cash gets locked before revenue is realised
• Forecasting accuracy breaks
• Margins erode quietly, month after month

The companies that regain control don’t chase blanket cost cuts or slow production blindly. They treat inventory as a financial signal, linked to throughput, sales velocity, and working capital return.

This is exactly where CFOSME steps in.

CFOSME works with founder-led and growth-stage businesses to:

• Translate shop-floor data into CFO-grade metrics
• Set WIP and FG targets that protect cash without choking growth
• Align production, sales, and finance around one objective: capital efficiency

Next step: If inventory is distorting your cash flow or growth decisions, speak to a CFOSME expert. A short consultation can clarify where capital is leaking and what to fix first.