1. **Lean Principles**:

Lean principles are a set of guidelines that businesses use to optimize their processes and eliminate waste. Here are the five lean principles:

1. Identify Value: This is the first step in the lean process. It involves identifying what the customer values in the product or service. This could be anything from quality, price, delivery time, etc.

2. Map the Value Stream: This involves mapping out every step in the process that brings a product or service to the customer. This helps to identify any steps that do not add value and can be eliminated.

3. Create Flow: Once the value stream has been mapped and waste has been identified, the next step is to ensure that the remaining steps flow smoothly without interruptions or delays.

4. Establish Pull: This principle is about ensuring that products are only produced to meet actual customer demand, rather than to build up inventory. This helps to reduce waste and improve efficiency.

5. Pursue Perfection: The final principle is about continuously improving the process. This involves regularly reviewing and refining the process to eliminate waste and improve efficiency.

These principles are designed to create a lean, efficient process that delivers maximum value to the customer with the minimum amount of waste.