CA SDM xFlow & Mobile does not support to Change Orders. At our organization we are using 'Chnage Order' for all kind of request. The reason is, version of CA SDM 12.6, 'Chnage Order' only supports to the multiple/classic workflows. Now we have upgraded to the CA SDM 14.1 & unable to use the xFlow & Mobile, because it is not supports to 'Chnage Order'.
If you provide the support to 'Change Order' Module in the xFlow & Mobile The tool will be very powerful.