Every now and then, users with the necessary access(authors,editors,etc)  accidentally restart the workflow on content . This can cause  unintended consequences  often causing the  content item go through  the whole workflow process  again to get published . The following property setting  can control access to the button and hide it  from  users  who would otherwise be able to invoke  it .

workflowrestart.requires.manager = true                                                                                                                                                                    

wcmconfigservice.properties   Or via  the  WCM WCMConfigService service.

Notes on the settings                                                                                                                                                                                                                                        Setting this to true means editors will not see the button and only managers and above will. This means the user will need delete access to restart workflow.It also adds the 'restart workflow' to those actions that can be hidden  at the authoring template. This provides the user more control over the restart workflow button  allowing the restart  workflow to be hidden from authors and approvers.