Is batch production the same as mass production?

No, there's a difference: The difference between the two is that batch productions is a form of production that is applied to a large number of items all at once whilst mass production is the same but made one at a time from mass produced parts.

Thank you for the clarification
What are mass produced parts? Say I am doing a batch culture of rotifers versus a mass culture of rotifers..
Mind giving an example please?

In the simplest of terms batch production is a particular sized lot of parts produced to a particular set of instructions. For example producing 50 medium green t-shirts would be a batch. Producing white medium t-shirts all day would be mass production.

Batch production planning requires discreet manufacturing routes and operations that tracks the process time and yield in order to define capacity, product cost and throughput.

Mass production planning requires repetitive process planning that in most cases measures labor consumption, output and yield against a defined set of route and operational expectations.

Yup many thanks judd