First-In, First-Out (FIFO)

Introduction: FIFO

FIFO, or First-In, First-Out, is a widely used inventory management system applied across industries such as manufacturing, retail, logistics, and healthcare. Its central principle is simple: the first items to enter inventory should be the first to be used or sold. FIFO is especially important where product freshness, shelf life, or safety is critical.

Background

FIFO is a core concept in Lean Management, supporting smooth flow, reduced waste, and efficient stock control. It has been adopted as both a best practice and a regulatory requirement in sectors like food and pharmaceuticals, where expiry dates and safety standards make proper inventory rotation essential.

Key Elements/Features

• Inventory rotation: Ensures older stock is used before newer items, reducing waste and spoilage.
• Production efficiency: Supports predictable, uninterrupted workflows by consuming materials in logical order.
• Financial benefits: Minimises write-offs, improves cost accuracy, and enhances inventory valuation.
• Regulatory compliance: Mandatory in industries such as pharmaceuticals, where strict quality standards apply.
• Limitations: Less relevant for products not sensitive to age or expiry, where LIFO (Last-In, First-Out) or demand-driven methods may be preferable.

Applications/Examples

FIFO is implemented through:

• Visual aids: Labels, dates, and colour coding for easy identification of older stock.
• Physical layout: Storage design that ensures older items are more accessible.
• Training and culture: Building employee awareness and reinforcing FIFO as part of daily routines.

For example, in a food warehouse, FIFO ensures older perishable items are shipped before newer stock, preventing spoilage and ensuring compliance with food safety regulations.

Relevance/Impact

By promoting better stock rotation, FIFO helps organisations maintain product quality, improve customer satisfaction, and reduce financial loss. Its simplicity and adaptability make it one of the most effective and enduring inventory management strategies in Lean operations.

See also

• LIFO (Last-In, First-Out)
• Kanban
• Inventory Management
• Lean Manufacturing