3.2.0 Conducting the case study After finishing with the protocol stage, the researcher embarked on the preparation of the real case study. For the study to be successful, the researcher carried three major activities. They included the preparation for collection of data, distributing questionnaires and carrying out the interviews. The stages accounted for the real case study. After the researcher had developed and tested the protocol, he totally embarked on the next stage. This is the real plan execution.
This phase has data collection as the most important activity (Thomas 2011, pp. 23). 3.2.1 Data collection The protocol shows the evidence provided in a case study. In a case study such as this one, data collection was treated as an issue of design which will improve the internal validity and construct of the study and also the external validity and reliability of the study. The researcher made use of six basic sources of evidence for the study. Each of the sources of evidence required that the researcher displays a different set of skills.
The researcher understood that not all these sources are important but he also recognized that multiple sources of data play a big role in making the study more reliable (Swanborn, 2010, pp. 67). The sources included in the study to obtain information were documentation, archival records, participant observation and direct observation. None of these sources has any advantage over the others but the researcher had to identify those that are most appropriate for his needs. In this case he utilized interviews, observation, and documentation more than the other.
Nevertheless they all complemented each other (Gerring 2007, pp. 43). 3.2.2 Participant and Direct Observation The researcher also employed participant observation in data collection. Through this method the researcher could take part in the events under study if he wanted. The danger here is that the researcher can be biased if he does take part (Gagnon 2010, pp. 33). However, for this particular study there were no evacuation exercises taking place and so the researcher did not have that opportunity.
The researcher also employed the direct observation method because he went to the sites to collect data. He only observed the high rise buildings and the ways of exit incase of an emergency as well as the equipment available for the exercise. However, the researcher also got an opportunity to observe a simulated evacuation exercise in one of the high-rise buildings. Even though it could not meet the information requirements of the study, the simulation provided an idea of the evacuation procedures and methods applied in a real evacuation exercise.
The researcher also took photographs at the site for purposes of record keeping. 3.2.3 Documents, Archival Records and Physical Artifacts A study based on documents can use memoranda, letters, study reports, agendas and other items. In this particular study, the investigator made use of study reports. He checked the validity of the reports to avoid picking the wrong data. This data was used to corroborate the information obtained from other sources. The researcher was careful not to over-rely on documents because they may not be absolutely true.
Archival records were also useful because they provide the maps and charts. However, the researcher was careful to determine the accuracy and origin of these documents. Physical artifacts are any type of physical evidence the investigator collects at the sight. This evidence could be notebooks and computer output (George & Bennet 2005, pp. 44). In data collection the researcher made use of multiple data sources, created a case study database and maintained a chain of evidence. Multiple data sources helped in evidence triangulation so as to make the data and the data collecting process more reliable.
Triangulation also corroborated the data obtained from other places. However, before choosing the technique, the researcher had to consider the cost of utilizing multiple sources and his ability to do the work.
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