LTT-PPTA ka STA-PPTA wala slack reduce karke hi ho jayega agar MFP bhejna ho to new Pfs hone se accomodate karne me bhi dikkat nahi hogi as yard me nahi rakhna hai, but TAT fir bhi 2 hrs ke aspas hi rahega. SC-DNR ko yard me rakhna hoga 12-14 hrs ke aspas uska space hai ya nahi idea nahi hai.