Here are my suggestions for appropriate production methods for each product listed, along with a brief justification:
Product Production Method Justification
Children's clothing Batch production Children's clothing comes in standard sizes but parents want a variety of styles, so batch production allows for economies of scale in production while offering some variety.
Electric plug for kitchen appliances Mass/flow production Electric plugs are a standardized product with consistent, high demand so mass/flow production allows for lowest unit costs through extensive automation and economies of scale.
Ceramic pots for wealthy customers Job production Wealthy customers will pay a premium for unique, high-quality ceramic pots customized to their individual tastes and home decor, so job production best meets