The paper proposes to use CR-prolog to add planning capabilities to a Geographical Information System. Cr-rules can restore the consistency of a program giving the diagnosis of possible causes of failure in a plan. In this paper we give an additional use for cr-rules: we propose to use cr-rules to obtain an alternative plan in case of the ideal plan fails. They not only restore consistency and ...

Modern query optimizers choose their execution plans primarily on a cost-minimization basis, assuming that the inputs to the costing process, such as relational selectivities, are accurate. However, in practice, these inputs are subject to considerable run-time variation relative to their compile-time estimates, often leading to poor plan choices that cause inflated response times. We present i...

A plan carried on in the real world may be affected by a number of unexpected events, plan threats, which cause significant deviations between the intended behavior of the plan executor (i.e., the agent) and the observed one. These deviations are typically considered as action failures. This paper addresses the problem of recovering from action failures caused by a specific class of plan threat...

Abstract A prototype tool to assist architects during the early design stage of floor plans has been developed, consisting of an Evolutionary Program for the Space Allocation Problem (EPSAP), which generates sets of floor plan alternatives according to the architect's preferences; and a Floor Plan Performance Optimization Program (FPOP), which optimizes the selected solutions according to therm...

Partial (or default) plans are plans that are constructed or applied without insuring that all support for the operators used in the plan is present in the planner's world model. Despite the apparent carelessness in their construction and application, partial plans are responsible for much of the efficiency of human problem solving. The ability to use partial plans relaxes some of the stringent...

  Selecting an effective project plan is a significant area in the project management. The present paper introduces a technique to identify the project plan efficient frontier for assessing the alternative project plans and selecting the best plan. The efficient frontier includes two criteria: the project cost and the project time. Besides, the paper presents a scheme to incorporate Directed Ac...

During the earliest phase of architectural design process, practitioners after analyzing the client’s design program, legal requirements, topographic constraints, and preferences synthetize these requirements into architectural floor plan drawings. Design decisions taken in this phase may significantly contribute to the building performance. On account of this reason, it is important to estimat...