The requisites for the applicability of the doctrine of res ipsa loquitur are: (1) the occurrence of an injury; (2) the thing which caused the injury was under the control and management of the defendant; (3) the occurrence was such that in the ordinary course of things, would not have happened if those who had control or management used proper care; and (4) the absence of explanation by the defendant. Of the foregoing requisites, the most instrumental is the control and management of the thing which caused the injury.[2]
[1] Professional Services, Inc. v. Natividad and Enrique Agana, 542 Phil. 482 (2007).

[2] Id. at 483.