Procedure: 𝑁 𝑆 𝑆 5
for   𝑖 = 1 to φ do
 select two jobs p and q at random from the current solution 𝑥
𝑥   = invert partial jobs between job 𝑝 and job 𝑞
if Z( 𝑥 ) < 𝑍 ( 𝑥 ) do
   𝑥 = 𝑥
end  if
end  for
Algorithm 4: Procedure of neighborhood structure N S S 5 .