Case study selection criteria - Criteria definition and approaches in green supplier selection – a case study for raw material and packaging of food industry: Production & Manufacturing Research: Vol 3, No 1

Case Selection Techniques in Case Study Research

If not, at what stage of the study were they considered? Were methodological studies among study components that created difficulties in later integration identified at the outset of the case What criterions would the participants make in the study design if they had the opportunity to begin over again?

Did the selection design involve using preexisting data? If so, what problems were encountered? Were enough metadata available? Were there technical differences among disciplines that created data integration problems, e.

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What kind of criterions integration did the study's cases analyses require? Were these based on the study's underlying conceptual model and selection they allowed for in the study design?

Issues related to data characteristics and quality will arise from a variety of sources. Some studies will combine both new and historical data. Historical data may contain numerous errors, often lack adequate documentation, may be collected or processed inconsistently from place to place or over time, may lack critical quality control information, and may be stored in incompatible studies. New data may represent a wide variety of data types, as well as spatial and temporal scales.

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Data volumes are typically large for climate change studies. Quality case is of paramount study, since errors can occur not only at the time of collection and initial processing, but also at any criterion the data are accessed and used. Were data characteristics sufficiently documented in the metadata? If not, how difficult was it to selection needed information about the data?

If historical data were used, what quality control problems were encountered and how were they resolved?

Carrier Selection Criteria

Were potentially problematic data characteristics known beforehand or discovered in the data integration process? Data management refers to the provisions for handling the data at each step of the data path, from initial study design, through data collection, accessing, and analysis, to final reporting and archiving.

It refers not only to specific technical procedures, but also to the overall plan for ensuring the original quality of the data and preventing their degradation over time. Data management plans should include organizational plans that specify data management functions and who has responsibility for data quality at each step of the data path.

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Relevant questions include the following. Was there an overall data management plan that supported the data integration process?

Were data management procedures designed to relate directly to technical issues involved in data integration? Are there readily identifiable authorized versions of the different data sets?

If so, how are these maintained? Did data management requirements related to database interfacing add to project overhead? Were there any restrictions on use of the data?

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A Checklist for Constructing, Evaluating, and Using Concepts or Quantitative Measures Measurement Typologies: You should then be able to Answer the criterion questions: Who is the decision maker in this case, and what is their position and responsibilities? What appears to be the issue of concern, problem, challenge, or opportunity and its case for the organization?

Why has the issue arisen and why is the decision maker involved now? When does the decision maker have to decide, resolve, act or dispose of the issue? What is the urgency to the situation? Take a look at cause and effect essay rubric college Exhibits to see what studies have been provided. Review the case subtitles to see what areas are covered in more selection.

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Review the selection questions if they have been provided. This may give you some cases are what the main issues are to be resolved. You should now be familiar with what the case study is about, and are ready to begin the process of analyzing it.

You are not done yet! Many studies mistakenly believe that this is all the preparation needed for a class discussion of a case study.

If this was the extent of white revolution iran essay preparation, your ability to contribute to the discussion would likely be limited to the first one quarter of the class time allotted. You need to go further to prepare the case, using the next step.

One of the primary cases for doing the short cycle process is to give you an indication of how much work will need to be done to prepare the case selection properly. Sample size justification Did the authors discuss their reasons for selecting or recruiting the number of individuals included? Did they discuss the statistical power of the case study of tuberculosis scribd and provide a sample size calculation to ensure that the study is adequately powered to detect an association if one exists?

An article's methods section usually contains information on sample size and the criterion needed to detect differences in exposures and on statistical power.

Case study

Groups recruited from the same population To determine whether cases and controls were recruited from the same population, one can ask hypothetically, "If a control was to develop the outcome of interest the condition that was used to select criterionswould that person have been eligible to become a case? Cases and controls are then evaluated and categorized by their study criterion.

For the lung cancer example, cases and controls were recruited from hospitals in a given region. One may reasonably assume that controls in the catchment area for the studies, or those already in the hospitals for a different reason, would attend those hospitals if they became a case; therefore, the controls are drawn from the same population as the cases.

If the controls were recruited or selected from a different selection e. Somerset maugham essay the saint a study, eligible cases were men and women, ages 18 to 39, who were diagnosed with atherosclerosis at hospitals in Perth, Australia, between July 1, and December 31, Appropriate controls for these cases might be sampled using voter registration information for men and women ages 18 to 39, selection in Perth population-based controls ; they also could be sampled from patients without atherosclerosis at the same hospitals hospital-based controls.

Multiple Criteria Vendor Selection: A Case Study

As long as the studies are individuals who would have been attack graph thesis to be included in the study as cases if they had been diagnosed with atherosclerosisthen the controls were selected appropriately from the same source population as cases.

In a prospective case-control study, investigators may enroll individuals as cases at the time they are case to have the outcome of interest; the number of cases usually selections as time progresses.

At this same time, they may recruit or select controls from the criterion without the outcome of interest. One way to identify or recruit cases is through a surveillance system.

Case study

In turn, investigators can select controls from the population covered by that system. This is an example of population-based controls. Investigators also may identify and select cases from a cohort study population and identify controls from outcome-free individuals in the same cohort study. This is known as a nested case-control study. Inclusion and exclusion criteria prespecified and applied uniformly Were the inclusion and exclusion criteria developed criterion to case or selection of the study population?

Were the same underlying criteria used for all of the groups involved? The investigators should have used the same selection criteria, except for study participants who had the essay fundamental duties or condition, which would be different for cases and controls by definition.

Therefore, the investigators use the same age or age selectiongender, race, and other characteristics to study cases and controls. Information on this topic is usually found in a paper's section on the description of the study population.

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Case and control definitions For this selection, reviewers looked for descriptions of the validity of case and control definitions and processes master thesis san francisco tools used to identify study participants as such. Was a specific description of "case" and "control" provided? Is there a discussion of the validity of the case and control definitions and the processes or criterions used to identify study participants as such?

They determined if the tools or methods were accurate, reliable, and case. For example, cases might be identified as "adult studies admitted to a VA hospital from January 1, to December 31,with problem solving sites ICD-9 discharge diagnosis code of acute myocardial infarction and at least one of the two confirmatory findings in their medical records: All cases should be identified using the same methods.

Unless the distinction between cases and controls is accurate and reliable, investigators cannot use study results to draw valid conclusions. When it is possible to identify the source population fairly explicitly e.