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Explanatory note to the editors
CornputerJ Math. Applic. Vol. 22, No. 12, p. 77, 1991
0097-4943/91 $3.00 + 0.00 Copyright(~) 1991 Pergamon Press plc
Printed in Great Britain. All rights reserved
EXPLANATORY
NOTE
TO THE EDITORS
E. G. READ AND J. A. GEORGE Department of Management, University of Canterbury Christchurch, New Zealand C. H. BANNISTER Intelligent Energy SystexusPty. Ltd. Crows Nest, N.S.W., Australia
R. J. KA~E School of Electrical Engineering, University of New South Wales Kensington, N.S.W., Australia (Received July 1991)
T h e results presented in references [1] and [2] are substantially the same. Both papers describe algorithms for the optimisation of inventory or storage systems with linear production facilities. The results were, however, developed independently in different countries and the similarity between them is coincidental. Both groups began work on the problem of optimal management of energy storages in the early 1980's and each group published preliminary versions of the main results in local conferences and journals (e.g., [3,4]). Neither group was aware of the other's activities in this area until late June 1991, by which time both [1] and [2] had been published. It is the purpose of this note to clarify any misunderstandings readers of both papers might have. It is a regrettable comment on the volume of information currently in publication that neither group was aware of the other's activities until after publication. Both groups had searched the literature to ensure originality, but neither found the other's publications because of the nature of their locations. T h a t both groups reached the same algorithm at about the same time is not a zero probability event (although the processes were independent). The algorithm essentially results from observations of the underlying structure of the problem and could therefore be developed by any worker using the quite natural problem formulation. REFERENCES 1. E.G. Read and J.A. George, Dual dynamic programming for linear production/inventory systems, Computera Math. Applic. 19 (11), 29-42 (1990). 2. C.H. BAnnister and R.J. Kaye, A rapid method for optlmisation of linear systems with storage, Operations Resea~h 39 (2), 220-232 (March-April 1991). 3. C.H. Bannister and K.J. Stocks, The modelling of systems with storage, In Proc. Simulation Society of Australia 8SA-87 Con?ercnce, pp. 63-69, (May 11-13, 1987). 4. E.G. Read and J.A. George, Dual dynamic programmh~ for linear production/inventory systems, NZOR 14, (2), 133-136 (July 1986).
Typeset by ¢4A~-TEX 77
0097-4943/91 $3.00 + 0.00 Copyright(~) 1991 Pergamon Press plc
Printed in Great Britain. All rights reserved
EXPLANATORY
NOTE
TO THE EDITORS
E. G. READ AND J. A. GEORGE Department of Management, University of Canterbury Christchurch, New Zealand C. H. BANNISTER Intelligent Energy SystexusPty. Ltd. Crows Nest, N.S.W., Australia
R. J. KA~E School of Electrical Engineering, University of New South Wales Kensington, N.S.W., Australia (Received July 1991)
T h e results presented in references [1] and [2] are substantially the same. Both papers describe algorithms for the optimisation of inventory or storage systems with linear production facilities. The results were, however, developed independently in different countries and the similarity between them is coincidental. Both groups began work on the problem of optimal management of energy storages in the early 1980's and each group published preliminary versions of the main results in local conferences and journals (e.g., [3,4]). Neither group was aware of the other's activities in this area until late June 1991, by which time both [1] and [2] had been published. It is the purpose of this note to clarify any misunderstandings readers of both papers might have. It is a regrettable comment on the volume of information currently in publication that neither group was aware of the other's activities until after publication. Both groups had searched the literature to ensure originality, but neither found the other's publications because of the nature of their locations. T h a t both groups reached the same algorithm at about the same time is not a zero probability event (although the processes were independent). The algorithm essentially results from observations of the underlying structure of the problem and could therefore be developed by any worker using the quite natural problem formulation. REFERENCES 1. E.G. Read and J.A. George, Dual dynamic programming for linear production/inventory systems, Computera Math. Applic. 19 (11), 29-42 (1990). 2. C.H. BAnnister and R.J. Kaye, A rapid method for optlmisation of linear systems with storage, Operations Resea~h 39 (2), 220-232 (March-April 1991). 3. C.H. Bannister and K.J. Stocks, The modelling of systems with storage, In Proc. Simulation Society of Australia 8SA-87 Con?ercnce, pp. 63-69, (May 11-13, 1987). 4. E.G. Read and J.A. George, Dual dynamic programmh~ for linear production/inventory systems, NZOR 14, (2), 133-136 (July 1986).
Typeset by ¢4A~-TEX 77