If this has to be made daily the 16321/22 SBC-Trivandrum exp run day has to be changed or the timing of 16321/22 has to be changed on thursday kcvlac exp,kcvl gr,Island exp are available.So if we assume the run days are changed then the run days of the 16331/32 TVC-MumbaiCST exp has to be changed bcoz both are having RSA with each other.Lets see what SR will do.If 16315 made daily then on thursdays there are total 4 trains fm SBC to TVC/KCVL already KCVL AC exp is not getting tht much occupancy then the fate of 16315 god knows???If railways changes the timing of 16321/22 SBC-TVC exp on thursdays then total 5 trains are available fm SBC-to TVC on thursdays!!!!!!!!!