Understanding Contingent Workmen Engagement
I think your query is about the engagement of contingent workmen. Please first consider what casual employment is and then contemplate what it would mean if one or more employees are regularly and continuously employed in the organization on a daily wage basis. In employment parlance, "casual work" or "contingent work" means occasional/incidental work, and "Casual Labour" or "contingent labour" refers to people engaged in such work intermittently or occasionally without any regularity. The mode of payment is not a determinant in such engagements; rather, the regularity of employment and the nature of work are the key factors.
If the work is of a perennial nature and one or more persons are regularly employed throughout a year on such work, with the total number of working days amounting to 240 days or more, then their service becomes "continuous service" as per Section 25-B of the Industrial Disputes Act, 1947.