An Empirical Study of Hybrid DEA and Grey System Theory on Analyzing Performance: A Case from Indian Mining Industry

Table 14

Technical (Frontier) change over the period 2010 to 2014.

Frontier	2010 => 2011	2011 => 2012	2012 =>2013	2013 => 2014	Average
DMU1	1.939121602	0.504629603	0.996300267	1.06244232	1.125623448
DMU2	2.015905198	1.10571636	0.82675343	0.964586441	1.228240357
DMU3	0.886326283	0.558239264	0.854416817	1.163988937	0.865742825
DMU4	1.000476644	0.741267265	0.870616146	1.100278455	0.928159628
DMU5	2.015905198	1.10571636	0.82675343	0.964586441	1.228240357
DMU6	0.861710382	1.018301532	1.014340243	1.130278256	1.006157603
DMU7	1.430118052	0.647589191	0.913795938	1.088321211	1.019956098
DMU8	1.295194694	1.04381169	0.851005728	1.030519595	1.055132927
DMU9	1.674444152	0.750046037	0.847017068	1.035738188	1.076811361
DMU10	1.546932314	0.645062431	1.000197233	1.374187295	1.141594818
DMU11	2.100229237	0.534814478	1.001097942	1.07648664	1.178157074
DMU12	1.531741397	0.645525171	0.906630074	1.025145953	1.027260649
DMU13	2.152459816	0.373558899	0.909365366	1.066824671	1.125552188
DMU14	2.899201454	0.247983445	1.423331621	1.003169142	1.393421416
DMU15	1.937809329	0.783532361	0.866668618	0.875736904	1.115936803
DMU16	3.081717159	0.493051054	1.145757947	1.157888408	1.469603642
DMU17	1.252853816	1.467478027	1.019956535	1.439608261	1.29497416
DMU18	1.891744104	0.577088174	1.14044083	0.876535166	1.121452069
DMU19	3.388616607	0.23432004	1.99304714	0.947786186	1.640942493
DMU20	1.095824176	0.931013697	1.11412316	0.874974664	1.003983924
DMU21	1.959059779	0.389859532	1.749978617	0.969696801	1.267148682
DMU22	0.940015391	1	1	0.593251026	0.883316604
DMU23	1.503821085	1.195321455	0.709459198	0.888087167	1.074172226
Average	1.756575125	0.738866351	1.042654493	1.030874701	1.142242668
Max	3.388616607	1.467478027	1.99304714	1.439608261	1.640942493
Min	0.861710382	0.23432004	0.709459198	0.593251026	0.865742825
SD	0.681955633	0.321859374	0.302317354	0.171291998	0.184302772