The International Cricket Council [Images] has appointed Marc Portus to undertake initial bio-mechanical analysis of Harbhajan Singh's [Images] bowling action.

Portus will review all relevant match and bio-mechanical footage as well as any other relevant information on Harbhajan, whose action was reported for the second time in three months in March this year.

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The Australian Institute of Sport bio-mechanist is expected to take two weeks to complete the project, an ICC [Images] statement said on Wednesday.

Portus will have to determine if there was a change in the action used by the Indian off-spinner by comparing the previous bio-mechanical analyses of his action with the action used during the Test that prompted the latest report from the match officials.

ICC Chief Executive Malcolm Speed [Images] said the ready availability of footage of Harbhajan's action from previous bio-mechanical analyses in both England [Images] and Australia [Images] as well as recent match footage provides Portus with the ability to start his investigation by reviewing the existing material on the bowler's action.