Inventory management is particularly important in the automobile industry because a vehicle consists of thousands of components sourced from a large network of suppliers. Excessive inventory increases carrying, storage and financing costs, whereas inadequate inventory can interrupt production and cause loss of sales. Maruti Suzuki India Limited (MSIL), a subsidiary of Suzuki Motor Corporation of Japan, provides an important example of how Just-in-Time (JIT), information technology, supplier development and continuous improvement can be integrated to achieve efficient inventory management. The company has progressively developed its inventory system from periodic scheduling to daily and eventually electronic, near-real-time coordination with suppliers.
1. Ideas for Better Inventory Management Based on MSIL
MSIL's experience suggests that effective inventory management should not be limited to controlling stocks inside the factory. It should cover the entire supply chain—from suppliers to production lines, dealers and customers.
First, Just-in-Time (JIT) should be adopted wherever demand and supply conditions permit. Under JIT, materials are procured and delivered close to the time when they are required for production. This reduces storage requirements, inventory carrying costs and the possibility of obsolete stock. MSIL's system is designed to align material orders with production schedules and maintain low inventory-to-sales ratios.
Second, companies should use real-time information systems. MSIL's E-Nagare system connects production requirements with vendors and enables suppliers to plan deliveries according to actual production needs. Such integration improves visibility and reduces uncertainty throughout the supply chain.
Third, supplier development and localisation are essential. MSIL has encouraged suppliers to locate close to its manufacturing facilities and has supported them through technical, managerial and financial assistance. The Unit notes that around 70% of suppliers are within 100 km and that components can be delivered directly to the assembly line. Local sourcing reduces transportation time and makes JIT more practical. lead times while improving quality. Smaller and more frequent deliveries are useful only when suppliers are reliable. Therefore, supplier evaluation, quality certification and continuous supplier improvement must accompany JIT.
Fifth, Kanban, bar coding and automated information systems can be used for material identification, replenishment and tracking. Kanban ensures that materials are replenished when the downstream process actually requires them, while bar codes improve the speed and accuracy of inventory transactions.
Finally, companies should monitor important indicators such as inventory turnover, days of inventory, stock-out frequency, obsolete inventory, supplier lead time and production stoppages. The objective should be minimum inventory consistent with uninterrupted production, rather than simply achieving the lowest possible inventory.
2. Identifying Indian-Origin Practices
Although several techniques used by MSIL—JIT, Kanban and Kaizen—are associated with Japanese management, Indian businesses have also developed practices that embody similar principles.
One prominent Indian example is the Mumbai dabbawala system. It demonstrates decentralised coordination, standardised processes, disciplined timing and exceptionally reliable movement of items through a complex network. Although it is not an automobile inventory system, its underlying principles—route optimisation, simple identification, coordination and time discipline—can provide useful lessons for supply-chain management.
Another Indian contribution is the concept of jugaad, meaning innovative and economical problem-solving under resource constraints. Properly understood, it can encourage organisations to develop low-cost solutions, simplify processes and make productive use of scarce resources. However, jugaad should complement—not replace—formal quality, safety and control systems.
Indian organisations have also developed strong capabilities in supplier networking, frugal engineering and improvisational logistics. MSIL's localisation efforts illustrate how global management principles can be adapted to Indian conditions. Therefore, the most appropriate approach is not to search for a completely separate "Indian JIT", but to combine Indian strengths in frugal innovation, adaptability and relationship management with globally proven inventory techniques.
3. Inventory Policies and Practices of MSIL from Financial Statements
The financial statements indicate that MSIL follows a systematic inventory policy. Its inventories are valued at the lower of cost and net realisable value (NRV), with cost determined on a weighted-average basis. The cost of finished goods and work-in-progress includes raw materials, direct labour, other direct costs and an appropriate allocation of variable and fixed production overheads based on normal operating capacity.
The inventory structure consists of several categories, including raw materials, work-in-progress, manufactured finished vehicles, vehicle spares and components, traded goods, stores and spares, and loose tools. For example, MSIL's 2018–19 financial statements reported total inventories of about ₹33.26 billion on a consolidated basis, with raw materials forming a major component. The same statements show that raw materials, WIP and finished goods are separately monitored, demonstrating the importance attached to different stages of the inventory cycle.
The financial data also indicates substantial reliance on indigenous materials. In 2018–19, 93% of raw-material and component consumption was indigenous, while only 7% was imported. Similarly, 94% of stores consumption was indigenous. This high level of localisation supports the company's JIT philosophy by reducing exposure to international transportation delays and foreign supply disruptions.
Operationally, MSIL's policies include JIT procurement, low buffer inventories, supplier integration, direct delivery to assembly lines, Kanban-based replenishment, localisation and continuous improvement. The case notes that the JIT and E-Nagare systems reduced inventory levels to less than a day's requirement. MSIL also reduced the material schedule from one month to 15 days, resulting in a reported 70% reduction in inventory within the plant. Scribd+1
Thus, the financial statements and operating practices together show a clear objective: keep investment in inventory low without compromising production continuity or customer service.
4. Comparison of Western and Japanese Management Practices and the Position of Indian Companies
Western and Japanese management approaches differ traditionally in their emphasis. Western management has generally placed greater emphasis on formal systems, financial measurement, individual accountability, economies of scale and optimisation. Large batches, safety stocks and sophisticated forecasting have historically been used to protect production against uncertainty.
Japanese management, in contrast, places strong emphasis on JIT, Kaizen, Kanban, waste elimination, quality at source, employee involvement and long-term supplier relationships. Inventory is viewed not merely as an asset but also as a potential source of waste because excessive stock can hide problems in production and supply processes. MSIL's practices strongly reflect these principles.
The best approach for modern companies is not to choose exclusively between the Western and Japanese systems. A hybrid model is more appropriate. Western practices such as data-based financial control, advanced forecasting, performance measurement and risk analysis can be combined with Japanese lean practices.
Indian companies have made considerable progress in this direction. Many large Indian manufacturers now use JIT, strategic sourcing, vendor development, outsourcing, digital procurement and integrated supply-chain systems. The case of MSIL demonstrates that Indian companies can successfully adapt Japanese techniques to Indian operating conditions.
However, Indian firms still face challenges such as infrastructure constraints, transportation delays, supplier capability differences, demand uncertainty and dependence on imported components in certain industries. Therefore, complete adoption of zero-inventory principles may not always be practical. Companies need appropriate contingency stocks for critical or imported items while keeping routine inventories lean.
Conclusion
MSIL demonstrates that successful inventory management is fundamentally a supply-chain management exercise rather than merely a stores-management function. Its success is based on JIT, E-Nagare, Kanban, supplier development, localisation, quality management, continuous improvement and close coordination with vendors. The financial statements support this operational philosophy through systematic inventory classification, valuation and control.
The major lesson for Indian companies is that inventory should be treated as a strategic resource. The objective should be to obtain the right material, in the right quantity, at the right place and at the right time, while eliminating unnecessary costs and waste. At the same time, Indian firms can strengthen these Japanese-inspired practices with indigenous strengths such as frugal innovation, adaptability and efficient network-based coordination. A balanced combination of Western analytical methods, Japanese lean management and Indian innovation can therefore provide a strong foundation for superior organisational performance.
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