$13.**$In operations, 'Just in Sequence $($JIS$)\text{'}$ is a concept that:$**$

a$)$ Delivers parts just as they are needed in the production process, in the exact order they are used

b$)$ Focuses on producing large batches of products in sequence

c$)$ Emphasizes on the sequence of hiring employees

d$)$ Refers to the sequential steps in financial planning

$14.**$Which of these is not typically a role of operations managers?$**$

a$)$ Developing product strategy

b$)$ Designing the layout of the factory floor

c$)$ Directly engaging in sales

d$)$ Overseeing the production process

$15.**\text{'}$Demand Forecasting' in operations management is used to:$**$

a$)$ Predict financial markets

b$)$ Estimate the quantity of a product or service that consumers will purchase

c$)$ Determine employee performance metrics

d$)$ Forecast weather conditions for logistical planning