Dear Mashrita, HR does not increase productivity directly but, of course, has a direct effect on productivity. Here are some suggestions:
a) Firstly, plan out HR activities on a half-yearly or yearly basis, such as a training calendar and programs (issues shall be chosen to attract the people).
b) Arrange small programs initially with a low budget, such as safety quizzes or games, etc.
c) Most importantly, conduct an employee survey to feel their pulse, understand their needs, and know what they expect from management.
It is very difficult to define what your organization and people want as it all depends on the cultural environment, mindset, etc. Factors like the state of your factory, the number of employees (categorized), what your factory produces, etc., also influence what needs to be done. If it is labor-intensive, we have to act accordingly.
Although I am not a consultant, I can share some of my experiences.
Regards, Jitendra [Phone Number Removed For Privacy Reasons]