In Jainism, choosing an auspicious day (mahurat) for starting a new venture—such as a factory—is an important tradition. During the period of Chaturmas (Chomasa or Chaumasa), which is the four-month monsoon period when Jain monks and nuns stay in one place, certain restrictions apply to auspicious activities.

General Guidance in Jainism:

• Chaturmas Period: Typically, auspicious ceremonies such as factory openings, housewarmings, or marriages are avoided during Chaturmas. This is due to increased religious activities, self-restraint, and spiritual focus during these months.
• Exceptions: Some Jains may consider specific days like Paryushan Parva or Samvatsari as highly auspicious for religious activities, but not for worldly beginnings such as factory inaugurations.

If it is necessary to perform mahurat during Chaturmas:

• Consult a knowledgeable Jain pandit or scholar from your sect (Shwetambar or Digambar) for the most suitable tithi (date), as there might be minor differences in practice.
• Some traditions may consider Labha Panchami (the fifth day of Kartik month, after Diwali) as an auspicious day for business and factory openings.

Summary:

• Best Practice: Avoid factory mahurat during Chaturmas if possible.
• If unavoidable: Consult your community's pandit for a permissible day, often after Chaturmas or on certain allowed tithis.

Always prioritize non-violence (ahimsa) and minimize harm to living beings in all business activities, as per Jain philosophy.