A comparison of actual and allocated costs for work accomplished using NASA PERT
In: IEEE transactions on engineering management: EM ; a publication of the IEEE Engineering Management Society, Band EM-12, Heft 3, S. 93-102
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In: IEEE transactions on engineering management: EM ; a publication of the IEEE Engineering Management Society, Band EM-12, Heft 3, S. 93-102
This is believed to be the first paper to promote the use of rules based on (quantitative) structure-activity relationship [(Q)SAR] models for identifying chemicals that are not likely to cause a specific adverse health effect, viz., skin irritation or corrosion. The purpose of this paper is to describe limit values for specific physicochemical properties that are appropriate for identifying chemical substances that have no skin irritation or corrosion potential. These physicochemical properties include melting point, molecular weight, octanol-water partition coefficient, surface tension, vapour pressure, aqueous solubility and lipid solubility. Based on analyses of 1833 chemicals, physicochemical properties for limits were defined to determine that when a chemical's physicochemical properties were either greater or less than these limits that these chemicals would have no skin irritation or corrosion potential. To facilitate classification and labeling, the application domains of these limits were constructed to correspond with the European Union's risk phrases for chemicals classified for skin irritation/corrosion, viz., R 34, R35 or R38. This is the second paper of four companion papers. The first paper discussed mechanisms that can lead to significant skin irritation or corrosion after acute exposures to chemicals. The third paper described the application of structural alerts to identify chemical substances with skin irritation or corrosion potential. The fourth paper described the Skin Irritation Corrosion Rules Estimation Tool (SICRET), a user-friendly tool that allows non-(Q)SAR experts to identify chemical substances with skin irritation or corrosion potential based on physicochemical property limits and structural alerts. In this second paper, rules were developed that can be used to predict the lack of any relevant skin irritation or corrosion potential within clearly defined chemical groups that can be compiled automatically by a computer without any chemical expert knowledge. These rules make available "physicochemical limit values" that can be used for computer-based identification of chemical substances that have no skin irritation or corrosion potential
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In: Public policy & aging report, Band 14, Heft 1, S. 13-14
ISSN: 2053-4892
In: Environmental management: an international journal for decision makers, scientists, and environmental auditors, Band 1, Heft 1, S. 67-96
ISSN: 1432-1009