It is more usual than the first one, and it creates a binding contract legally. A simple offer which was done by the contractor to carry out the relevant work which is mentioned in the invitation to tender is the second type of tender.
The acceptance of such a contract does not create a binding agreement itself. The first is a standing offer under a maintenance work for a specified period and this tender type is rare compared to others. We can identify two types of contractual bindings in the industry. There are various methods of tenderingto analyze, negotiate and award a project to a contractor.