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Incident investigation validity

The source of the data—insurance claims files and records of plant owners — cannot provide reliable accident causal data. From personal experience, 1 can say that insurance claims reports rarely include causal data. And my studies of incident investigation reports completed by supervisors require the conclusion that they are not a reliable source for valid causal data. [Pg.132]

Incident investigation requires a particular skill to assure that injured persons and those involved with the incident will be forthcoming with the pertinent causal factors. If an impression is created that the intent is to place blame, persons involved will usually become protective of their well-being, important information may be withheld, and the probability of having a valid investigation will be diminished. [Pg.226]

A well-conducted incident investigation has content-based validity. However, it is difficult to assess the other two types of validity. For criterion-based validity, we are not aware of what might be used as a criterion. We might look at the correlation between system causes of quality problems, as discovered by process-improvement teams, and the system causes of incidents. We would expect to find considerable overlap. If we failed to find this overlap, we might question the validity of either or both classes of investigations. [Pg.108]

Information derived from data-gathering activities serves as the basis for valid conclusions and recommendations. Without effective data gathering, the incident cannot be defined or analyzed effectively. In some cases, gathering data can consume most of the time and resources spent by the investigation team. Some teams report that it can take up to 70 percent of the investigation effort depending on the nature of the occurrence. [Pg.115]

Several industrial explosions have occurred during the past 40 years which appear to be attributable to this cause, but here has been little recognition of this or of the common features in many of the incidents. Too little investigational work in this area has been published to allow any valid conclusions to be drawn as to the detailed course of the observed reactions. However, it may be more than coincidence that in all the incidents reported, the structures of the nitroaromatic compounds involved were such that o- or p-aci-nitroquinonoid salt species could have been formed under the reaction conditions. Many of these salts are of very limited thermal stability. All of the available (circumstantial) evidence was collected and published [4]. Limited work by... [Pg.2464]

Here /g is the intensity of incident monochromatic radiation, I is the intensity of radiation at a distance I cm, and e is the decadic molar extinction coefficient of an absorbing species (concentration, c mole. 1 ). This law is strictly valid only if molecular interactions are unimportant at all concentrations. Deviations occur for a variety of reasons this means that the validity of the law should be checked under the particular experimental conditions. An initial determination of the absorption spectrum of the compound under investigation is obligatory. This produces immediate qualitative information, particularly about the usefulness of the source of radiation. Banded, diffuse or continuous spectra give direct information about the complexity and variety of primary processes that may occur. Further information will be gained from the effect of radical traps such as Oj or NO, and of various energy transfer agents. [Pg.35]

The equality resulting from Kirchhoff s law between the directional spectral absorptivity and the emissivity, aA = eA, suggests that investigation of whether the other three (integrated) absorptivities aA, a and a can be calculated from the corresponding emissivities sx, s and e should be carried out. This will be impossible without additional assumptions, as the absorptivities ax, a and a are not alone material properties of the absorbing body, they also depend on the incident spectral intensity Kx of the incident radiation, see Table 5.1. The emissivities sx, s and s are, in contrast, purely material properties. An accurate test is therefore required to see whether, and under what conditions, the equations analogous to (5.69), ax = sx, a = s and a = e are valid. [Pg.541]

Application to Human Exposure (Urine and Blood). To date, there have been no reports of the collection of biomedical samples from individuals with suspected lewisite exposure. Samples from such an incident will be critical for confirming the validity of assaying for the biomarkers observed in animal models. Additionally, the biomarkers that have been investigated in animal studies to date have indicated a rapid clearance in urine and less so for blood. This will obviously create severe problems for the retrospective determination of lewisite exposure beyond a few days at most when analyzing urine samples. The blood assay for both bound and free CVAA will potentially provide a longer opportunity for retrospective confirmation of exposure (based on one animal study), but also indicates a substantial decrease (90%) in concentration levels observed over a 10 day period. [Pg.530]


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Incidents investigation

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