Guest editorial
The validation of models of complex systems 263 – 277
J-M Choukroun
Plan design as committee decisionmaking 279 – 295
M Batty
Planning as argumentation 297 – 312
H A Goldstein
Ideation and evaluation methods applied to land-use planning 313 – 324
S R Kshirsagar, ED Brill Jr
Evaluation of methods for generating alternatives to regional wastewater treatment systems 325 – 337
S-Y Chang, S-L Liaw
Evaluation of methods for exploring ill-defined problems 339 – 348
L D Hopkins
Reviews 349 – 362
