Data analysis Case Study 4: Theory-testing research: testing a probabilistic relation
7.2.11 Implications for the theory
Four hypotheses were confirmed. This is an indication that the propo- sition from which these hypotheses were derived is correct. However, the hypothesis on vehicle capacity was rejected. The proposition on vehicle capacity was based on the idea that, due to time windows, the possibilities of combining deliveries in one vehicle roundtrip would decrease, resulting in an increase in the number of vehicles and a corresponding decrease in the vehicle load factor. We hypothesized that, in particular, retailers using large trucks would have difficulties filling their vehicles and that they would be forced to make roundtrips with only partly filled trucks. As a result they would make trips with more empty than filled capacity, whereas a retailer using small vehicles would still make trips with well-filled smaller vehicles. From the rejection of the hypothesis we conclude that this reasoning was wrong. It appears that vehicle capacity in itself is not a determinant of the sensitivity to time windows. How can this be explained? We think now that there are other, much more important determinants of the underuse of the capacities of the available vehicles. If we take into account that the length of a vehicle roundtrip can either be deter- mined by the vehicle’s capacity actually used in that roundtrip, or by other factors e.g. the driver’s working times, opening hours of shops, etc., then we would be able to see how those other factors might explain the extent to which underuse of vehicle capacity contributes to total distribution costs. The effect of time window pressure might be that more vehicle roundtrips are getting constrained because of such non-capacity constraints. If such non-capacity constraints apply, this would imply that it is more cost efficient to use smaller vehicles, but it would not imply that retailers starting with smaller vehicles before 168 time window pressure increases are less sensitive to time windows. This reasoning can be formulated as a new proposition: Proposition 6: Retailers with a lower ability to use their full vehicle capacity are likely to have a higher increase in total distribution costs that occur with a given change in time access window pressure than retailers with a higher ability to use their full vehicle capacity.7.2.12 Replication strategy
Since we formulated a new proposition, we need new theory-testing research. For such testing we need to define the concept “ability to use the full vehicle capacity” as well as to determine how its values could be measured.7.3 Methodological reflection on Case Study 4
7.3.1 Theory
The object of study in Case Study 4 is the same as in Case Study 3: distribu- tion activities by retailers from a retailer’s distribution centre to the shops during one week. The concepts and their operationalization into variables were pre- cisely defined similar to the definitions in Case Study 3. However, the dependent variable is total distribution costs, which is the result of the separate distribution costs studied in Case Study 3. There are five propositions for each of the dimensions of distribution strategy. Each proposition states that there is a probabilistic relation between this dimension and total distribution costs. As in Case Study 3, the domain of the theory included all large retail- ers that distribute goods from a distribution centre to shops that are at least partly located in shopping areas in cities in which time access windows could be installed. The universe of instances of the object of study is bounded by the geographical boundary of Western Europe where retailers and local governments are familiar with the concept of time access windows. Implicitly it seems that the theory is applicable in different sectors as the study was done in supermarket, department store, fashion shop, and specialist shop sectors.Parts
» BUKU | SAIDNA ZULFIQAR BIN TAHIR (VIKAR)
» Our definition of a case study
» Chapter 2: Case studies in business research
» Chapter 3: Principles of research Chapter 4: Theory-testing research general
» Chapters 10–11: Practice-oriented research Overview of the book
» Reading specific topics Overview of the book
» Suggestions for students How to read this book
» References BUKU | SAIDNA ZULFIQAR BIN TAHIR (VIKAR)
» Types of case study research
» Objectives of case study research
» Guidelines for case study research
» Evaluations of case study research
» Conclusion BUKU | SAIDNA ZULFIQAR BIN TAHIR (VIKAR)
» General research objectives of theory-oriented and practice-oriented research
» Orientation: how to choose between theory-oriented or practice-oriented research
» Theory Principles of theory-oriented research
» Theory-oriented research: contribution to theory development
» Replication Principles of theory-oriented research
» Representativeness, external validity, and generalizability
» Exploration of theory Exploration for theory-oriented research
» Exploration of practice for finding a proposition
» Exploration of practice for confirming the relevance of a proposition
» Contributions to theory development
» Practice Principles of practice-oriented research
» Practice-oriented research: contribution to a practitioner’s knowledge
» Exploration of practice Exploration for practice-oriented research
» Research objectives in theory-testing research
» Propositions that express a sufficient condition
» Propositions that express a necessary condition
» Propositions that express a deterministic relation
» Propositions that express a probabilistic relation
» Business relevance of propositions
» Strategy for testing a proposition that expresses a sufficient condition
» Strategy for testing a proposition that expresses a necessary condition
» Strategy for testing a proposition that expresses a deterministic relation
» Strategy for testing a proposition that expresses a probabilistic relation
» Testing more complex conceptual models
» Outcome and implications BUKU | SAIDNA ZULFIQAR BIN TAHIR (VIKAR)
» Summary BUKU | SAIDNA ZULFIQAR BIN TAHIR (VIKAR)
» Introduction How to test a sufficient or a necessary condition with a case study
» Candidate cases How to test a sufficient or a necessary condition with a case study
» Case selection How to test a sufficient or a necessary condition with a case study
» Hypothesis How to test a sufficient or a necessary condition with a case study
» Measurement How to test a sufficient or a necessary condition with a case study
» Data presentation Data analysis
» Replication strategy How to test a sufficient or a necessary condition with a case study
» Domain Conceptual model Theory
» Research objective Case Study 1: Theory-testing research: testing a necessary condition
» Research strategy Case Study 1: Theory-testing research: testing a necessary condition
» Candidate cases Case selection
» Hypotheses Case Study 1: Theory-testing research: testing a necessary condition
» Measurement Case Study 1: Theory-testing research: testing a necessary condition
» Radical innovation projects Data presentation
» Incremental innovation projects Data presentation
» Data analysis Case Study 1: Theory-testing research: testing a necessary condition
» Replication strategy Case Study 1: Theory-testing research: testing a necessary condition
» Theory Methodological reflection on Case Study 1
» Research objective Methodological reflection on Case Study 1
» Research strategy Methodological reflection on Case Study 1
» Candidate cases Methodological reflection on Case Study 1
» Case selection Methodological reflection on Case Study 1
» Hypothesis Measurement Methodological reflection on Case Study 1
» Data presentation Methodological reflection on Case Study 1
» Data analysis Methodological reflection on Case Study 1
» Replication strategy Methodological reflection on Case Study 1
» Research strategy Case Study 2: Theory-testing research: testing a necessary condition
» Candidate cases Case Study 2: Theory-testing research: testing a necessary condition
» Case selection Case Study 2: Theory-testing research: testing a necessary condition
» Hypothesis Case Study 2: Theory-testing research: testing a necessary condition
» Measurement Case Study 2: Theory-testing research: testing a necessary condition
» Theory Methodological reflection on Case Study 2
» Candidate cases Methodological reflection on Case Study 2
» Case selection Methodological reflection on Case Study 2
» Hypothesis Methodological reflection on Case Study 2
» Measurement Methodological reflection on Case Study 2
» Data presentation Methodological reflection on Case Study 2
» Data analysis Methodological reflection on Case Study 2
» Replication strategy Methodological reflection on Case Study 2
» Introduction How to test a deterministic relation with a case study
» Candidate cases How to test a deterministic relation with a case study
» Case selection How to test a deterministic relation with a case study
» Hypothesis How to test a deterministic relation with a case study
» Data analysis How to test a deterministic relation with a case study
» Replication strategy How to test a deterministic relation with a case study
» Introduction Case Study 3: Theory-testing research: testing a deterministic relation
» Research objective Case Study 3: Theory-testing research: testing a deterministic relation
» Research strategy Case Study 3: Theory-testing research: testing a deterministic relation
» Hypotheses Case Study 3: Theory-testing research: testing a deterministic relation
» Measurement Case Study 3: Theory-testing research: testing a deterministic relation
» Theory Methodological reflection on Case Study 3
» Research objective Research strategy
» Candidate cases Methodological reflection on Case Study 3
» Case selection Hypotheses Methodological reflection on Case Study 3
» Measurement Data presentation Methodological reflection on Case Study 3
» Introduction How to test a probabilistic relation with a case study
» Introduction Case Study 4: Theory-testing research: testing a probabilistic relation
» Research objective Case Study 4: Theory-testing research: testing a probabilistic relation
» Research strategy Case Study 4: Theory-testing research: testing a probabilistic relation
» Candidate cases Case Study 4: Theory-testing research: testing a probabilistic relation
» Case selection Case Study 4: Theory-testing research: testing a probabilistic relation
» Hypotheses Measurement Case Study 4: Theory-testing research: testing a probabilistic relation
» Data presentation Case Study 4: Theory-testing research: testing a probabilistic relation
» Data analysis Case Study 4: Theory-testing research: testing a probabilistic relation
» Theory Methodological reflection on Case Study 4
» Specifying the relation between known concepts
» Discovering a not yet known concept
» Discovering concepts and their relation
» Discovering concepts Principles of theory-building research
» Research strategies in theory-building research
» Outcome and implications Summary
» Introduction How to design and conduct a theory-building case study
» Candidate cases How to design and conduct a theory-building case study
» Case selection How to design and conduct a theory-building case study
» Extracting relevant evidence How to design and conduct a theory-building case study
» Coding How to design and conduct a theory-building case study
» Data presentation How to design and conduct a theory-building case study
» Sufficient condition Data analysis
» Necessary condition Data analysis
» Deterministic relation Data analysis
» Sufficient condition An example of data analysis
» Necessary condition An example of data analysis
» Deterministic relation Probabilistic relation
» Outcome How to design and conduct a theory-building case study
» Introduction Case Study 5: Theory-building research
» Candidate cases Case Study 5: Theory-building research
» Case selection Extracting relevant evidence
» Coding Case Study 5: Theory-building research
» Outcome Case Study 5: Theory-building research
» Justification of a theory-building case study
» Candidate cases Methodological reflection on Case Study 5
» Data analysis Methodological reflection on Case Study 5
» Outcome Methodological reflection on Case Study 5
» Research objective in hypothesis-testing research
» Research strategy in hypothesis-testing research
» Research objective in hypothesis-building research
» Research objective of descriptive practice-oriented research
» Research strategy of practice-oriented descriptive research
» Introduction How to design and conduct a practice-oriented case study
» Case selection How to design and conduct a practice-oriented case study
» Implications of the research results
» Introduction Case Study 6: Hypothesis-testing practice-oriented research
» Hypothesis Case Study 6: Hypothesis-testing practice-oriented research
» Measurement Case Study 6: Hypothesis-testing practice-oriented research
» Data analysis Case Study 6: Hypothesis-testing practice-oriented research
» Results and implications Case Study 6: Hypothesis-testing practice-oriented research
» Practice Methodological reflection on Case Study 6
» Research objective Methodological reflection on Case Study 6
» Case selection Methodological reflection on Case Study 6
» Measurement Methodological reflection on Case Study 6
» Data presentation Methodological reflection on Case Study 6
» Data analysis Methodological reflection on Case Study 6
» Implications for practice Methodological reflection on Case Study 6
» Introduction Case Study 7: Descriptive practice-oriented research
» Absence of guidelines or criteria
» Measurement Case Study 7: Descriptive practice-oriented research
» Data presentation Case Study 7: Descriptive practice-oriented research
» Concept definition Case Study 7: Descriptive practice-oriented research
» Implications Case Study 7: Descriptive practice-oriented research
» Practice Research objective Methodological reflection on Case Study 7
» Case selection Measurement Methodological reflection on Case Study 7
» Data presentation Methodological reflection on Case Study 7
» Data analysis Methodological reflection on Case Study 7
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