# Elsevier

# European Journal of Operational Research

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**Current editor:**Jesus Artalejo

**Current editor:**Jean-Charles. Billaut

**Current editor:**Robert Dyson

**Current editor:**Lorenzo Peccati

**For corrections or technical questions regarding this series, please contact (Zhang, Lei)**

**Series handle:**repec:eee:ejores

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### 1995, Volume 86, Issue 1

**162-175 An interactive heuristic for financial planning in decentralized organizations***by*Goedhart, Marc H. & Spronk, Jaap**176-187 The design of supply contracts as a problem of delegation***by*Schenk-Mathes, Heike Y.

### 1995, Volume 85, Issue 3

**435-453 Productivity measurement in industrial operations***by*Sudit, Ephraim F.**454-472 Confidentiality control of tabulated data: Some practical network models***by*George, John A. & Kuan, Chong Juin & Ring, Brendan J.**473-487 Three practical criteria of comparison among ordinal preference aggregating rules***by*Perez, J. & Barba-Romero, S.**488-503 Multiperiod allocation of substitutable resources***by*Klein, Rachelle S. & Luss, Hanan & Rothblum, Uriel G.**504-514 Method for evaluating the strength of retarding steps on a marshalling yard hump***by*Avramovic, Zoran Z.**515-531 Minimizing makespan for flow shop scheduling by combining simulated annealing with sequencing knowledge***by*Zegordi, Seyed Hessameddin & Itoh, Kenji & Enkawa, Takao**532-540 Optimal setup time reduction for a single product with dynamic demands***by*Diaby, Moustapha**541-555 Minimizing total tardiness in permutation flowshops***by*Kim, Yeong-Dae**556-575 Optimal lot streaming for multiple products in a two-machine flow shop***by*Vickson, R. G.**576-592 Minimization of agreeably weighted variance in single machine systems***by*Cai, X.**593-609 Backtracking of jobs in one-dimensional machine location problems***by*Sarker, Bhaba R. & Wilhelm, Wilbert E. & Hogg, Gary L. & Han, Min-Hong**610-624 A result on projection for the vehicle routing ptoblem***by*Gouveia, Luis**625-635 Average shadow price in a mixed integer linear programming problem***by*Crema, Alejandro**636-649 Extended optimal replacement model with random minimal repair costs***by*Shey-Huei Sheu & Griffith, William S. & Toshio Nakagawa**650-669 Periodicity of the profile process in Markov manpower systems***by*Gerontidis, Ioannis I.**670-685 Stochastic analysis of a non-homogeneous Markov system***by*Tsantas, N.

### 1995, Volume 85, Issue 2

**229-243 Interactions between operational research and environmental management***by*Bloemhof-Ruwaard, Jacqueline M. & van Beek, Paul & Hordijk, Leen & Van Wassenhove, Luk N.**244-262 The search for information -- A patient perspective on multiple opinions***by*Mehrez, A. & Yuan, Y. & Gafni, A.**263-281 Talking to Sibilla: An approach to context dependent natural language comprehension***by*Felici, Giovanni**282-296 A stochastic programming model for money management***by*Golub, Bennett & Holmer, Martin & McKendall, Raymond & Pohlman, Lawrence & Zenios, Stavros A.**297-315 A unified framework for the selection of a Flexible Manufacturing System***by*Shang, Jen & Sueyoshi, Toshiyuki**316-326 Accounting for complexity in costing high technology manufacturing***by*Cooper, William W. & Sinha, Kingshuk K. & Sullivan, Robert S.**327-339 A comparison of stochastic scheduling rules for maximizing project net present value***by*Yang, Kum Khiong & Tay, Lee Choo & Sum, Chee Chuong**340-351 Optimal inspection effort and scheduling for a manufacturing process with repair***by*Jewkes, Elizabeth M.**352-367 On performance measures for evacuation systems***by*Lovas, Gunnar G.**368-382 A maximin procedure for the optimal insertion timing of ad executions***by*(Sundar) Balakrishnan, P. V. & Hall, Nicholas G.**383-398 Multiobjective optimization of table olive preparation systems***by*Kopsidas, Gerassimos C.**399-415 Distributional efficiency in multiobjective stochastic linear programming***by*Abdelaziz, F. Ben & Lang, P. & Nadeau, R.**416-432 A bibliography of expert system applications for business (1984-1992)***by*Wong, Bo K. & Monaco, John A.

### 1995, Volume 85, Issue 1

**1-17 Theoretical models of sales promotions: Contributions, limitations, and a future research agenda***by*Raju, Jagmohan S.**18-38 A classified bibliography of recent research relating to project risk management***by*Williams, Terry**39-52 A proposal on improved procedures for estimating task-time distributions in PERT***by*Lau, Hon-Shiang & Somarajan, C.**53-65 A neural network for classifying the financial health of a firm***by*Lacher, R. C. & Coats, Pamela K. & Sharma, Shanker C. & Fant, L. Franklin**66-81 Financial statement planning in the presence of tax constraints***by*Back, B. & Back, R. J. R.**82-96 Optimal investment policies for a polluting firm in an uncertain environment***by*Kort, Peter M.**97-110 Determining the optimal warranty price based on the producer's and customers' risk preferences***by*Chun, Young Hak & Tang, Kwei**111-131 The impact of information timeliness on the predictability of stock and futures returns: An application of vector models***by*Ostermark, Ralf & Hernesniemi, Hannu**132-148 Period and phase of customer replenishment: A new approach to the Strategic Inventory/Routing problem***by*Webb, Ian R. & Larson, Richard C.**149-160 A single-server retrial queue with server vacations and a finite number of input sources***by*Li, Hui & Yang, Tao**161-177 Delay analysis for discrete-time queueing systems with multiple randomly interrupted servers***by*Laevens, Koenraad & Bruneel, Herwig**178-191 Approximate analysis for queueing networks with finite capacity and customer loss***by*Shi, Leyuan**192-204 Brownian motion approximations for tankage assessment and stock control***by*Nieboer, Roelant A. J. J. & Dekker, Rommert**205-220 Validation and statistical analysis procedures under the common random number correlation-induction strategy for multipopulation simulation experiments***by*Joshi, Shirish & Tew, Jeffrey D.**221-225 HOPDM (version 2.12) -- A fast LP solver based on a primal-dual interior point method***by*Gondzio, Jacek

### 1995, Volume 84, Issue 3

**503-505 Cutting and packing***by*Bischoff, E. E. & Wascher, G.**506-521 Solution approaches to irregular nesting problems***by*Dowsland, Kathryn A. & Dowsland, William B.**522-538 A new algorithm for the minimal-area convex enclosure problem***by*Grinde, Roger B. & Cavalier, Tom M.**539-561 Compaction and separation algorithms for non-convex polygons and their applications***by*Li, Zhenyu & Milenkovic, Victor**562-571 The modified integer round-up property of the one-dimensional cutting stock problem***by*Scheithauer, Guntram & Terno, Johannes**572-579 CUTGEN1: A problem generator for the standard one-dimensional cutting stock problem***by*Gau, T. & Wascher, G.**580-589 An LP-based approach to a two-stage cutting stock problem***by*Valerio de Carvalho, J. M. & Guimaraes Rodrigues, A. J.**590-598 Establishing the optimality of sequencing heuristics for cutting stock problems***by*Yuen, Boon J. & Richardson, Ken V.**599-617 An AND/OR-graph approach to the solution of two-dimensional non-guillotine cutting problems***by*Arenales, Marcos & Morabito, Reinaldo**618-632 An approximation algorithm for solving unconstrained two-dimensional knapsack problems***by*Fayard, Didier & Zissimopoulos, Vassilis**633-644 Exact solutions for constrained two-dimensional cutting problems***by*Parada Daza, Victor & Gomes de Alvarenga, Arlindo & de Diego, Jose**645-661 Guillotineable bin packing: A genetic approach***by*Kroger, Berthold**662-680 How to use structural constraints to compute an upper bound for the pallet loading problem***by*Neli[beta]en, Josef**681-692 Loading pallets with non-identical items***by*Bischoff, E. E. & Janetz, F. & Ratcliff, M. S. W.**693-712 Packing different-sized circles into a rectangular container***by*George, John A. & George, Jennifer M. & Lamar, Bruce W.

### 1995, Volume 84, Issue 2

**227-234 Symbiotic systems: Exploiting human creativity***by*Scriabin, M. & Kotak, D. B. & Whale, K. G.**235-249 The effects of learning on the firm's optimal design quality path***by*Kouvelis, Panagiotis & Mukhopadhyay, Samar K.**250-264 A tactical model for airing new seasonal products***by*Kim, Donghoon & Morrison, Donald G. & Tang, Christopher S.**265-278 Alternative growth versus security in continuous dynamic trading***by*Dohi, T. & Tanaka, H. & Kaio, N. & Osaki, S.**279-291 Implementing a subjective MCI model: An application to the furniture market***by*Cliquet, Gerard**292-309 NICHER: An approach to identifying defensible product positions***by*Sudharshan, D. & Ravi Kumar, K. & Gruca, Thomas S.**310-329 Information theory as a unifying statistical approach for use in marketing research***by*Brockett, Patrick L. & Charnes, Abraham & Cooper, William W. & Learner, David & Phillips, Fred Y.**330-342 The scheduling problem where multiple machines compete for a common local buffer***by*Khosla, Inder**343-355 Minimizing the number of tardy jobs for m parallel machines***by*Ho, Johnny C. & Chang, Yih-Long**356-370 Simultaneous determination of the cutting speed and lot size values in machining systems***by*Koulamas, Christos P.**371-384 Joint product durability and lot sizing models***by*Gupta, Diwakar & Gerchak, Yigal**385-401 A fixed interval due-date scheduling problem with earliness and due-date costs***by*Chhajed, Dilip**402-415 A two reorder level inventory system with renewal demands***by*Kalpakam, S. & Sapna, K. P.**416-430 A comparative analysis of approaches for determining optimal price and order quantity when a sale increases demand***by*Ardalan, Alireza**431-443 Analysis of a (Q, r, T) inventory policy with deterministic and random yields when future supply is uncertain***by*Parlar, Mahmut & Perry, David**444-457 Stochastic analysis of a continuous review perishable inventory system with positive lead time and Poisson demand***by*Ravichandran, N.**458-466 The newsboy problem under progressive multiple discounts***by*Khouja, Moutaz**467-480 Marginal cost criteria for preventive replacement of a group of components***by*Dekker, Rommert & Roelvink, Ingrid F. K.**481-493 A multiobjective optimization approach to thermal generating units maintenance scheduling***by*Kralj, Branimir & Petrovic, Radivoj**494-498 UGC: An algorithm for two-stage unconstrained guillotine cutting***by*Van Der Wilt, Ann

### 1995, Volume 84, Issue 1

**1-4 Editorial***by*Bunn, Derek W. & Silverman, Barry G.**5-24 Monitoring for hazard in flight management systems***by*Greenberg, A. D. & Small, R. L. & Zenyuh, J. P. & Skidmore, M. D.**25-34 MACRAME: A problem formulation and model structuring assistant in multiactorial contexts***by*Norese, Maria Franca**35-46 Knowledge-based DSS for construction contractor prescreening***by*Taha, Mahmoud A. & Park, Sang C. & Russell, Jeffrey S.**47-59 A knowledge-based model management system for aircraft survivability analysis***by*Masud, Abu S. M. & Metcalf, Paul & Hommertzheim, Don**60-81 An intelligent interactive project management support system***by*Jungen, F. J. & Kowalczyk, W.**82-95 Industrial linear optimization problems solved by constraint logic programming***by*Bisdorff, R. & Laurent, S.**96-115 An experiment in scheduling and planning of non-structured jobs: Lessons learned from artificial intelligence and operational research toolbox***by*Ntuen, Celestine A. & Park, Eui H.**116-133 R&D Decision Advisor: An interactive approach to normative decision system model construction***by*Regan, Peter J. & Holtzman, Samuel**134-149 Interactive decision aiding for group decision support***by*Salo, Ahti A.**150-162 Acquiring expert rules with the aid of decision tables***by*Seagle, John P. & Duchessi, Peter**163-169 The impact of semantic ambiguity on Bayesian weights***by*O'Leary, Daniel E.**170-191 CEG: A case based decision modeling architecture***by*Moustakis, Vassilis S.**192-212 Dynamic grouping of parts in flexible manufacturing systems -- a self-organizing neural networks approach***by*Kulkarni, Uday R. & Kiang, Melody Y.**213-225 System design and evaluation using discrete event simulation with AI***by*Clymer, John R.

### 1995, Volume 83, Issue 3

**431-438 Differential game models of advertising competition***by*Erickson, Gary M.**439-451 Trip frequency scheduling for bus route management in Bangkok***by*van Oudheusden, Dirk L. & Zhu, William**452-465 Coal blending optimization under uncertainty***by*Shih, Jhih-Shyang & Frey, H. Christopher**466-488 Modeling investment uncertainty in the costs of global CO2 emission policy***by*Birge, John R. & Rosa, Charles H.**489-502 Stochastic annealing for synthesis under uncertainty***by*Painton, Laura & Diwekar, Urmila**503-513 Solving stochastic programming problems via Kalman filter and affine scaling***by*Puthenpura, Sarat & Sinha, Lakshman & Fang, Shu-Cherng & Saigal, Romesh**514-529 A new approach to stochastic programming problems: Discrete model***by*Joshi, Rajani R.**530-546 Stochastic analysis of combat models under different termination decision rules***by*Jaiswal, N. K. & Sangeeta, Y. & Gaur, S. C.**547-567 A cooperative fuzzy game theoretic approach to multiple objective design optimization***by*Dhingra, A. K. & Rao, S. S.**568-580 Fuzzy optimal flow on imprecise structures***by*Chanas, S. & Delgado, M. & Verdegay, J. L. & Vila, M. A.**581-593 Three models of fuzzy integer linear programming***by*Herrera, F. & Verdegay, J. L.**594-620 Grey integer programming: An application to waste management planning under uncertainty***by*Huang, Guo H. & Baetz, Brian W. & Patry, Gilles G.**621-638 The bottleneck generalized assignment problem***by*Martello, Silvano & Toth, Paolo**639-654 Modelling pairwise comparisons on ratio scales***by*Bryson, Noel & Mobolurin, Ayodele & Ngwenyama, Ojelanki**655-669 A new aggregation-disaggregation algorithm***by*Shioyama, Tadayoshi & Tanaka, Kimiyuki**670-685 Coupling the auxiliary problem principle with descent methods of pseudoconvex programming***by*Zhu, Daoli & Marcotte, Patrice**686-699 Automatic decrease of the penalty parameter in exact penalty function methods***by*Mongeau, Marcel & Sartenaer, Annick**700-710 Data envelopment analysis: Visualizing the results***by*El-Mahgary, Sami & Lahdelma, Risto**711-712 A note on exact algorithms for the bottleneck generalized assignment problem***by*Martello, Silvano & Toth, Paolo

### 1995, Volume 83, Issue 2

**249-252 Tenth EURO summer institute***by*Roucairol, Catherine & Thiriez, Herve & Krarup, Jakob & Plateau, Gerard & Tolla, Pierre**253-270 Some thoughts on combinatorial optimisation***by*Bjorndal, M. H. & Caprara, A. & Cowling, P. I. & Della Croce, F. & Lourenco, H. & Malucelli, F. & Orman, A. J. & Pisinger, D. & Rego, C. & Salazar, J. J.**271-282 FUN: A dynamic method for scheduling problems***by*Bugnon, B. & Stoffel, K. & Widmer, M.**283-300 Heuristics for biquadratic assignment problems and their computational comparison***by*Burkard, Rainer E. & Cela, Eranda**301-309 A bound for the symmetric travelling salesman problem through matroid formulation***by*Cowling, Peter & Maffioli, Francesco**310-319 Generalized pairwise interchanges and machine scheduling***by*Della Croce, Federico**320-329 Scheduling jobs within time windows on identical parallel machines: New model and algorithms***by*Gabrel, Virginie**330-346 A comparative study of both standard and adaptive versions of threshold accepting and simulated annealing algorithms in three scheduling problems***by*C.K.Y. Lin & Haley, K. B. & Sparks, C.**347-364 Job-shop scheduling: Computational study of local search and large-step optimization methods***by*Lourenco, Helena Ramalhinho**365-375 Lower bounds for the quadratic semi-assignment problem***by*Malucelli, Federico & Pretolani, Daniele**376-393 The inverse-parametric knapsack problem***by*Burkard, Rainer E. & Pferschy, Ulrich**394-410 A minimal algorithm for the multiple-choice knapsack problem***by*Pisinger, David**411-429 Using Tabu search for solving a dynamic multi-terminal truck dispatching problem***by*Rego, Cesar & Roucairol, Catherine

### 1995, Volume 83, Issue 1

**1-20 Optimization methods for electric utility resource planning***by*Hobbs, Benjamin F.**21-38 An exact algorithm for orthogonal 2-D cutting problems using guillotine cuts***by*Christofides, Nicos & Hadjiconstantinou, Eleni**39-56 An exact algorithm for general, orthogonal, two-dimensional knapsack problems***by*Hadjiconstantinou, Eleni & Christofides, Nicos**57-68 A method for the cutting stock problem with different qualities***by*Ronnqvist, Mikael**69-82 A classification of formulations for the (time-dependent) traveling salesman problem***by*Gouveia, Luis & Vo[ss], Stefan**83-104 A new extension of local search applied to the Dial-A-Ride Problem***by*Healy, Patrick & Moll, Robert**105-116 Estimation and determination of shortest path length in a road network with obstacles***by*Dubois, Nicolas & Semet, Frederic**117-136 A differential game approach to the dynamic mixed behavior traffic network equilibrium problem***by*Byung-Wook Wie**137-153 Temporal distribution of public transport demand during the peak period***by*Alfa, Attahiru Sule & Chen, Mingyuan**154-166 Time depending shortest-path problems with applications to railway networks***by*Nachtigall, K.**167-181 Refueling strategies to maximize the operational range of a nonidentical vehicle fleet***by*Yuan, Yufei & Mehrez, Abraham**182-199 Properties of expected costs and performance measures in stochastic models of scheduled transport***by*Carey, Malachy & Kwiecinski, Andrzej**200-219 The hub location and routing problem***by*Aykin, Turgut**220-236 A smooth penalty function algorithm for network-structured problems***by*Zenios, Stavros A. & Pinar, Mustafa C. & Dembo, Ron S.**237-244 A suboptimal solution to a hierarchial network design problem using dynamic programming***by*Sancho, N. G. F.**245-246 A comment on "models, modelling and modellers: an application to risk analysis" by B. Wahlstrom European Journal of Operational Research 75 (1994) 477-487***by*Cooper, W. W.**247-248 Reply to W.W. Cooper European Journal of Operational Research 83 (1995) 245-246***by*Wahlstrom, Bjorn

### 1995, Volume 82, Issue 3

**383-408 Activity nets: A guided tour through some recent developments***by*Elmaghraby, Salah E.**409-421 On the development of educational policies***by*Tavares, L. Valadares**422-437 Key features for model building decision support systems***by*Binbasioglu, Meral**438-457 The strategic value of flexibility in sequential decision making***by*Benjaafar, Saifallah & Morin, Thomas L. & Talavage, Joseph J.**458-475 Preference programming through approximate ratio comparisons***by*Salo, Ahti A. & Hamalainen, Raimo P.**476-489 Proper efficiency and cardinal utilities in multicriteria decision making***by*Huang, Zhimin & Li, Susan X. & Raghavan, Veeravalli & Bruce Sun, D.**490-502 The conflict analysis method: bridging the gap between ELECTRE, PROMETHEE and ORESTE***by*van Huylenbroeck, G.**503-521 ZAPROS-LM -- A method and system for ordering multiattribute alternatives***by*Larichev, O. I. & Moshkovich, H. M.**522-539 Comparison of the REMBRANDT system with analytic hierarchy process***by*Olson, David L. & Fliedner, Gene & Currie, Karen**540-555 Heuristics for scheduling in flowshop with multiple objectives***by*Rajendran, Chandrasekharan**556-591 Multiobjective water resources investment planning under budgetary uncertainty and fuzzy environment***by*Sutardi & bector, C. R. & Goulter, Ian**592-614 Simulated annealing for manufacturing systems layout design***by*Souilah, Abdelghani**615-646 On a new class of bilevel programming problems and its use for reformulating mixed integer problems***by*Frangioni, Antonio

### 1995, Volume 82, Issue 2

**211-213 OR Models for Maintenance Management and Quality Control***by*Van der Duyn Schouten, Frank A. & Tapiero, Charles S.**214-224 The marginal cost analysis and its application to repair and replacement policies***by*Berg, Menachem P.**225-240 Integrating optimisation, priority setting, planning and combining of maintenance activities***by*Dekker, Rommert**241-257 An integrated and structured approach to improve maintenance***by*Vanneste, S. G. & Van Wassenhove, L. N.**258-269 A simple condition monitoring model for a direct monitoring process***by*Christer, A. H. & Wang, W.**270-282 A Bayesian failure model based on isotropic deterioration***by*van Noortwijk, Jan M. & Cooke, Roger M. & Kok, Matthijs**283-294 Optimal maintenance policies in random environments***by*Ozekici, Suleyman**295-301 Optimal repairman assignment in two symmetric maintenance models***by*Koole, Ger**302-322 N parallel queueing systems with server breakdown and repair***by*Wartenhorst, Pieter**323-338 Maintenance optimization of a production system with buffer capacity***by*Van der Duyn Schouten, F. A. & Vanneste, S. G.**339-358 Time scale decomposition in production planning for unreliable flexible manufacturing systems***by*Haurie, A.**359-372 Turnpikes in flow control models of unreliable manufacturing systems***by*Haurie, A. & van Delft, Ch.**373-382 Contract design and the control of quality in a conflictual environment***by*Reyniers, Diane J. & Tapiero, Charles S.

### 1995, Volume 82, Issue 1

**1-17 Mathematical models of brand choice behavior***by*Manrai, Ajay K.**18-25 Application of goal programming in project selection decision -- A case study from the Indian coal mining industry***by*Mukherjee, Kampan & Bera, Achintya**26-38 Process technologies, learning and brand proliferation***by*Tombak, Mihkel M.**39-52 A fuzzy set model for market share and preference prediction***by*Burhan Turksen, I. & Willson, Ian A.**53-78 Modeling global market entry decision by fuzzy logic with an application to country risk assessment***by*Levy, Joshua B. & Yoon, Eunsang**79-97 Qualitative multicriteria methods for fuzzy evaluation problems: An illustration of economic-ecological evaluation***by*Munda, G. & Nijkamp, P. & Rietveld, P.**98-110 Warehouse-retailer system with stochastic demands -- Non-identical retailer case***by*Chew, Ek Peng & Tang, Loon Ching**111-124 Financial planning with fractional goals***by*Goedhart, Marc H. & Spronk, Jaap**125-144 Preventive maintenance with limited historical data***by*Silver, Edward A. & Fiechter, Claude-Nicolas**145-162 Verification and validation of simulation models***by*Kleijnen, Jack P. C.**163-175 Water supply operations during drought: A discrete hedging rule***by*Shih, Jhih-Shyang & ReVelle, Charles**176-189 Tabu search for the multilevel generalized assignment problem***by*Laguna, Manuel & Kelly, James P. & Gonzalez-Velarde, JoseLuis & Glover, Fred**190-205 Exact and approximation algorithms for the operational fixed interval scheduling problem***by*Kroon, Leo G. & Salomon, Marc & Van Wassenhove, Luk N.**206-208 Avoiding anomalies in the 2 algorithm by Martello and Toth***by*Pisinger, David**209-210 A one-vendor multi-buyer integrated inventory model: A comment***by*Goyal, S. K.

### 1995, Volume 81, Issue 3

**445-459 High interaction graphics***by*Eick, Stephen G. & Wills, Graham J.**460-473 Reconsidering the distribution structure of gasoline products for a large oil company***by*van der Bruggen, Lambert & Gruson, Ruud & Salomon, Marc**474-478 Sales effects of depot locations***by*Baunack, Bettina & Mercer, Alan & Napp, Anna**479-488 Pictures from an exhibition: Images of OR/MS***by*Pidd, Michael**489-499 Service level risk in a pipeline system: A stochastic analysis***by*von Lanzenauer, Christoph Haehling & James, William G. & Wright, Don D.**500-511 Water resources planning in the Middle East: Application of the PROMETHEE V multicriteria method***by*Abu-Taleb, Maher F. & Mareschal, Bertrand**512-520 Effects of inflation and time-value of money on an inventory model with time-dependent demand rate and shortages***by*Hariga, Moncer A.**521-534 Industry simulation: System modelling with an object oriented/DEVS technology***by*Ninios, Panagiotis & Vlahos, Kiriakos & Bunn, Derek W.**535-542 A reservoir hydroelectric system: Exactly and approximately optimal policies***by*Lamond, Bernard F. & Monroe, Susan L. & Sobel, Matthew J.**543-552 Some problems with the design of self-learning open-loop control systems***by*Flikop, Ziny**553-556 A worst-case analysis of two approximate algorithms for the asymmetric travelling salesman problem***by*Righini, Giovanni & Trubian, Marco**557-560 Transformation of multidepot multisalesmen problem to the standard travelling salesman problem***by*Yang GuoXing**561-570 The minimal average cost flow problem***by*Chen, Y. L.**571-578 Flowshop sequencing with mean flowtime objective***by*Ho, Johnny C.