summoning witnesses, order for discovery, production or inspection of documents, issue of commission for inspection of the premises, fixing a date of hearing, admissibility of a document, relevancy of a question, etc. It is true that in those cases, no rights are decided finally and that in an appeal against the final order, parties get a chance to challenge those findings rendered at the interlocutory stage. He, however, argues that in the instant case, the very jurisdiction of the Rent Control Court, the arrears of rent, etc. were in dispute, and by the impugned order, the same has been decided erroneously and in such cases, it cannot be said that the rights of the tenant are not affected, more so, when the question of jurisdiction is found against him, and if it were found in his favour, the whole proceedings before the Rent Control Court would have been terminated. He also relies on the judgment of this Court in Basil. N.M .(supra) contends that the question of whether an order affects the parties' rights has to be decided on a case-to-case basis, and no straight jacket formula can be evolved.