LU, LINGFA; YUAN, JINJIANG - In: Asia-Pacific Journal of Operational Research (APJOR) 25 (2008) 01, pp. 1-10
-hard. They also provided a heuristic with the worst-case performance ratio $\frac{5}{3}$, and pointed out that no heuristic can … have a worst-case performance ratio less than $\frac{3}{2}$ unless P = NP. In this paper, we provide a new heuristic which … has the best possible worst-case performance ratio $\frac{3}{2}$. We also consider an extended version in which the jobs …
