About your mentions are ..
a. Vendor turnaround is activity of vendor arrive to SRP hub and unloading products /checking number of products as follow TESCO system is matching or not /get the invoice ( signed ) to his company for the time of turnaround we generate by TESCO system ( ORWMS system )
b. Trunking turnaround is activity of Express trunking from BBTDC to SRPDC as same activity vendor turnaround but calculate by manual by our staff keep the number of time per trailer ( trunking ) then the result show AVG time of trunking turnaround every night per trailer ka .
if you have any question , pls let me know , Thank you