Final answer:
A training program's content should be primarily influenced by a needs assessment and learning objectives to ensure it is tailored to specific job requirements and can measure effectiveness.
Step-by-step explanation:
The content of a training program should be most influenced by needs assessment and learning objectives. A needs assessment identifies the gap between the current and desired skills and performance levels, which dictates what the training needs to address. Learning objectives provide clear targets for what the training should achieve, ensuring that the content is focused and able to measure the effectiveness of the training. This focused approach helps in creating a training program that is tailored to the specific requirements of the job role and the individuals performing it, rather than being shaped by external factors or arbitrary criteria.