whatever happened to the " rule of thumb", that if you can take off on it ,you can land on it.
immediate smoke/ whatever after take off ,you can land on that runway.
if assessing(?) later on route ,look up your limiting t/o wt.
if below ,you can land.
if on fire, or in serious doubt,do not go for pretty.
old saying.." i can live with the egg on my face, hate like hell to have to go to all those funerals"