Fig 1.
Heuristic process of data collection.
Table 1.
Keywords used in search process.
Fig 2.
Overview of selection process.
Table 2.
Eligibility requirements checklist.
Fig 3.
Category classification for the set of 142 studies.
Fig 4.
Summary statistics for the set of 142 studies.
Fig 5.
Context of HT and data source.
Fig 6.
Percent of studies involving 4Ps.
Fig 7.
Granular view of theoretical and methodological topic inclusion for the set of studies categorized as analytics.
The x-axis lists each study; and the y-axis depicts each of the Theoretical Approaches and Method. If a study includes a given feature value, the box is black, and grey otherwise. Theoretical approaches and methods are sorted in descending order based on the total count for each row.
Fig 8.
Granular view of theoretical and methodological topic inclusion for the set of studies categorized as operations research or position / thought.
The x-axis lists each study; and the y-axis depicts each of the Theoretical Approaches and Method. Operations Research studies appear on the left (in blue), and Position / Thought studies appear on the right (in red). If a study includes a given feature value, the box is black, and grey otherwise. Theoretical approaches and methods are sorted in descending order based on the total count for each row.
Fig 9.
A screenshot of the spreadsheet tool created for closer examination of the set of 142 studies.