In Mass production, single product is produced in large quantity not variety of product in large quantity

Planning and scheduling are crucial aspects in manufacturing operations as they help in optimizing resources, meeting customer demands, and ensuring efficient production processes. However, the planning and scheduling of job order manufacturing and mass production manufacturing differ in various aspects. Let's analyze the assertion and reason given in the question in detail.

Assertion (A): Planning and scheduling of job order manufacturing differ from planning and scheduling of mass production manufacturing.
Reason (R): In mass production manufacturing, a large variety of products are manufactured in large quantity.

Let's examine each statement individually and then evaluate the relationship between them.

1. Planning and scheduling of job order manufacturing:
Job order manufacturing refers to the production of customized or unique products based on specific customer orders. It involves small batch sizes or even a single item being produced at a time. Due to the nature of customization and uniqueness, the planning and scheduling in job order manufacturing focus on flexibility and customization. The production processes need to be adaptable to accommodate the variations in product specifications, design, and customer requirements. The planning and scheduling in job order manufacturing are typically more complex and require detailed coordination to ensure timely delivery and customer satisfaction.

2. Planning and scheduling of mass production manufacturing:
Mass production manufacturing involves the production of a large quantity of standardized products. The production is carried out continuously or in large batches. The planning and scheduling in mass production manufacturing aim to achieve high production volumes, efficiency, and cost-effectiveness. The processes are designed for repetitive operations with standardized setups and reduced changeover times. The scheduling focuses on optimizing the production flow and minimizing idle time between operations. The planning is based on accurate demand forecasting and aims to ensure smooth production without delays or disruptions.

Now, let's evaluate the relationship between the assertion and reason:

Assertion (A) states that planning and scheduling of job order manufacturing differ from planning and scheduling of mass production manufacturing. This statement is true because the two types of manufacturing have distinct characteristics and requirements.

Reason (R) states that in mass production manufacturing, a large variety of products are manufactured in large quantity. This statement is not the correct explanation of Assertion (A). While it is true that mass production involves a large variety of products, the key difference lies in the volume and standardization of production rather than just the variety. Mass production focuses on high volume and standardized production, while job order manufacturing focuses on customization and flexibility.

Therefore, both Assertion (A) and Reason (R) are individually true, but Reason (R) is not the correct explanation of Assertion (A). Hence, the correct answer is option C: A is true, but R is false.