Operations Research/Management Science Research in Europe: A Bibliometric Overview

Table 10

Distribution of the most repeated keywords by year (between 1990 and 2018).

Keywords	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	Freq.
Multiobjective optimization	2	13	15	14	20	28	25	25	30	43	42	35	47	47	60	48	62	87	83	106	97	123	115	105	98	146	119	130	135	1900
Heuristics	3	19	13	18	26	31	44	33	57	42	36	29	56	55	50	60	61	85	77	81	71	78	83	84	70	90	88	82	65	1587
Scheduling	3	16	15	16	28	28	42	21	46	37	38	42	43	33	51	70	57	83	90	79	78	81	84	89	67	93	70	95	82	1577
Simulation	0	7	11	9	10	21	26	26	29	31	32	28	29	31	41	36	37	55	55	74	69	65	69	57	51	77	52	67	71	1166
Optimization	1	13	15	13	18	26	20	20	30	22	36	28	35	19	28	25	44	33	44	67	53	61	72	66	40	70	73	79	90	1141
Supply chain management	0	0	0	0	0	7	3	3	3	7	12	24	35	32	49	30	42	59	60	70	63	74	89	78	66	66	60	84	87	1103
Genetic algorithms	0	0	0	1	1	7	14	11	15	19	17	12	18	19	30	27	32	50	45	72	54	65	73	68	42	66	49	42	57	906
Data envelopment analysis	1	3	2	2	5	14	20	13	10	20	16	28	12	14	33	33	25	29	21	56	52	41	62	51	58	68	55	74	91	909
Integer Programming	2	6	16	6	8	15	9	10	29	14	15	22	25	15	30	15	39	38	36	44	44	50	56	32	47	55	69	51	79	877
Decision support systems	2	9	12	11	24	13	13	25	28	19	23	24	21	25	22	24	40	33	25	49	36	28	46	44	32	50	55	56	45	834
Combinatorial optimization	0	4	4	4	8	8	8	17	17	10	14	13	15	16	22	28	40	34	38	47	31	39	46	56	40	57	36	60	45	757
Dynamic programming	0	5	8	12	16	12	15	22	18	16	27	17	13	23	8	17	24	28	36	42	31	33	31	45	39	44	33	39	45	699
Linear programming	1	10	26	18	22	16	19	23	16	27	24	20	19	25	22	20	24	27	25	29	24	21	32	22	26	30	42	29	20	659
Optimal control	1	11	10	5	8	10	11	16	18	20	16	22	20	23	19	16	25	23	18	26	35	25	41	34	33	29	41	46	50	652
Branch and Bound	1	6	7	7	8	14	19	13	29	21	22	17	11	17	20	19	19	29	44	28	24	25	27	36	29	20	30	33	30	605
Inventory	0	3	7	4	4	7	18	13	14	24	16	18	8	16	14	26	33	32	26	28	19	27	28	45	34	30	29	40	35	598
Global optimization	0	6	3	15	18	9	11	18	14	16	20	17	15	14	18	21	19	24	26	40	34	19	28	35	23	25	33	36	34	591
Tabu Search	0	3	0	1	6	7	16	9	27	16	13	10	17	12	16	25	17	24	39	35	29	30	44	27	24	22	20	18	9	516
Stochastic programming	0	1	4	2	1	3	9	14	14	11	16	13	12	9	14	18	15	31	24	40	26	29	43	23	25	37	34	38	51	557
Metaheuristics	0	0	0	0	0	0	2	0	1	5	3	5	8	7	18	18	26	30	25	41	29	31	49	44	27	41	32	59	24	525