Methods for identifying occupational disease hazard factors

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The last edit to this post was made by slll611 on 2016-1-28 at 22:32. 1. Analogical method: The analogical method is an identification technique that relies on data regarding occupational disease hazards from existing projects of the same type as the project in question for making inferences. When using this method, emphasis should be placed on identifying the similarities between the object under consideration and the analogous object. These include: ① Similarities in the general characteristics of the project, such as the production process, manufacturing methods, raw and auxiliary materials, and product structure; ② Similarities in occupational health protection measures, including the sources of harmful factors, their concentrations/intensities, and the protective measures taken; ③ Similarities in environmental conditions, mainly including meteorological and geographical factors. The analogy method is the most commonly used identification technique in the preliminary assessment of occupational disease hazards in construction projects. The advantage is that, through on-site investigations and actual tests of analogous enterprises, it is possible to provide an intuitive qualitative and quantitative description of the occupational disease hazards. The drawback is that differences in production scale, manufacturing processes, production equipment, etc., which may exist between the object under consideration and the analogous object, lead to variations in the types of occupational disease hazards and their severity. Most of the evaluation items we encounter at present involve the application of new technologies and materials, making it difficult to find suitable local analogs. To this end, it is proposed to establish a national professional association for the assessment of occupational health hazards in construction projects, and to use Internet technology to set up a professional website for such assessments. A membership system is implemented, with the evaluation data on the effectiveness of occupational disease hazard control carried out by each organization being classified and uploaded to establish a \"database of analogous data information,\" thereby enabling resource sharing. Furthermore, in practical work, it is very difficult to find completely identical analog objects. Therefore, when performing analog quantitative identification, necessary adjustments should be made based on actual conditions such as engineering and health protection characteristics related to production scale, production management, and other factors. 2. Data replication method: The data replication method is a technique that involves using information on occupational disease hazards from similar construction projects that have already been completed, or from literature on such projects, to conduct analogical analysis and achieve quantitative and qualitative identification. This method falls under the category of literature-based analogy; it has advantages such as simplicity and ease of use, but its reliability and accuracy are difficult to control. 3. Experience method: The experience method is a technique that relies on the relevant professional knowledge and practical work experience possessed by an individual, as well as their own judgment skills, to identify potential occupational disease hazards in the workplace. This method is mainly applicable to the identification of workplaces in some traditional industries that use conventional manufacturing processes. The advantage is that it is simple and easy to implement. The drawback is that the recognition accuracy is limited by the evaluator’s knowledge, experience, and available information, leading to omissions and errors. To address the aforementioned shortcomings, expert seminars can be held to exchange opinions and pool insights, thereby making the identification of occupational disease hazards more comprehensive and reliable. 4. Checklist Method: To systematically identify the occupational disease hazards arising from factories, workshops, production units, plants and equipment, as well as the production environment and working processes, this method involves preparing a list of items to be checked in the form of questions in advance, thereby enabling a systematic inspection. Its application can overcome the shortcomings of other methods, such as lack of systematicness, comprehensiveness, and unclear focus; as a qualitative identification method, it has a wide range of applications. The drawback is that checklists have poor versatility; for projects in different industries and with different processes, checklists with distinct contents need to be developed, and it is quite difficult to create a complete and effective checklist. This method is applicable to the identification of traditional craft projects in traditional industries, and should be used in conjunction with the experience method. 5. Engineering analysis method: The engineering analysis method involves analyzing the production process flow of the object under consideration, the layout of production equipment, the principles of chemical reactions, as well as the names and contents of the raw materials and auxiliary materials used, including any toxic impurities they may contain, in order to identify potential occupational disease hazards. In construction projects that employ new technologies and processes, when no analogous cases or relevant data are available, using engineering analysis methods is the most persuasive way to identify occupational disease hazards. 6. Measurement method: The measurement method is a technique that involves using instruments to collect samples on-site and analyze the potential occupational disease hazards present in the workplace. It can be used for the quantitative identification of occupational disease hazard factors ； It can also be used for the qualitative identification of occupational disease hazard factors ； It can be used for evaluating the effectiveness of controls against occupational disease hazards in construction projects, as well as for the regular monitoring and assessment of occupational disease hazard factors in the workplace ； It can also be used for the pre-assessment of occupational disease hazards in construction projects. In tasks such as the evaluation of the effectiveness of controls against occupational disease hazards in construction projects, the regular monitoring and assessment of occupational hazard factors in the workplace, and analogous surveys for the preliminary assessment of occupational disease hazards in construction projects, sampling and testing of known occupational hazard factors are typically carried out, which falls under the category of quantitative identification. Conversely, the qualitative analysis of potential occupational disease hazards in the workplace using advanced instruments and equipment falls under the category of qualitative identification. By using a gas chromatography-mass spectrometer for the qualitative and quantitative analysis of harmful substances in workplace air, it is possible to identify certain harmful factors that are difficult to detect using engineering analysis methods or empirical approaches. Currently, some suppliers of industrial chemicals often market their products as environmentally friendly or green products in order to promote them; or, for the purpose of keeping their formulas secret, they only provide product names and codes. As a result, the departments that use these chemicals are unaware of their components and lack understanding of the potential occupational health hazards they may pose. For the identification of such hazard factors, empirical measurement methods offer significant advantages. Therefore, this law is highly effective in identifying occupational disease hazards in workplaces where coatings and adhesives containing mixed organic solvents are produced and used. The results obtained through empirical measurement are objective and accurate, and they often serve as an important basis for the conclusions regarding occupational disease hazards in construction projects as well as for health supervision decisions. The disadvantages are the large amount of human and material resources required, the long time needed, and the fact that incomplete testing items or inaccurate test results can lead to errors or omissions in the identification conclusions. 7. Theoretical derivation method: The theoretical derivation method is a technique for the quantitative identification of occupational disease hazard factors. The concentration (intensity) of harmful substances is quantitatively calculated by utilizing the physicochemical principles of harmful substance diffusion, as well as the principles of propagation and superposition of physical factors such as noise and electromagnetic fields. Just as mathematical models of toxin diffusion can be used to predict the toxin concentration at a workplace at a certain distance from the source of toxin release, the principle of noise superposition can be employed to predict changes in noise intensity when a new noise source is added to a workshop.