There are several synonyms for the phrase "check out the procedure" that can be used interchangeably depending on the context. One common phrase is "review the protocol," which suggests a more formal process for examining the steps necessary for completing a task. Another similar phrase is "inspect the process," which emphasizes closer examination of the method or system in place. "Examine the steps" or "scrutinize the procedure" are other possible synonyms, both of which emphasize careful attention to detail. Ultimately, the choice of synonym will depend on the specific context and the level of scrutiny required for the task at hand.