Dear Yo2487,
This is in addition to what I have written in my previous post. How workers are treated on the shop floor? Does shop floor manager or supervisor abuses the workers? Since they are unable to retaliate, they could be venting their anger by through their destructive activities.
Do you have labour union? Are any labour leaders instigating the employees? Did you take disciplinary action against any worker in the recent past? Try to find is there any pattern in the events.
Do you have well-instituted grievance handling machinery in your company? If yes, then how many grievances came up for hearing in the last financial year? How is the interpersonal environment in the company? Have you conducted any survey on the interpersonal environment at the shop floor?
How frequently top leadership meets the workers?
Mr Nathrao has suggested installation of CCTV camera. In addition to this, your top management may call all the workers and meet them without the presence of Supervisors or Managers (Skip meeting). Let the assurance be given that if they have any grudge against anyone, they can approach HR and not destroy the accessories in the toilet.
Instances of vandalisation of the company property are not new. Not necessarily it happens in manufacturing companies. It has happened everywhere. Software professionals in the software companies have deleted valuable data ensuring that no trace of evidence is left. However, all this bogs down to unaddressed simmering discontent.
From the HR Management standpoint, these are the signs of organisation's culture. Whether the issue is addressed or not, it is time to audit the organisation's culture and fix the cracks.
Thanks,
Dinesh Divekar