Ipai zvigadzirwa zvemhando yepamusoro kune vatengi, ivai neIQC, QC, FQC uye OQC kuti vanyatso dzora mhando yechinhu chega chega chinongedzo chekugadzira chigadzirwa. Kubva pazvinhu zvakagadzirwa kusvika pakuongororwa kwekutumira, takapa vashandi vakakosha kuti vaongorore chinongedzo chega chega kuti tive nechokwadi chemhando yezvigadzirwa.