Case studies
Ten problems, and the methods that solved them
Each of these was a real engagement. Clients are not named and no identifying detail is published, so what is described is the statistical problem — which is the part that shows whether a consultancy knows what it is doing.
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Sectors
Methods
All case studies
Ten engagements
Cox Proportional Hazards Modelling to Identify Patients Most at Risk of Readmission
Modelling time-to-event rather than event-or-not, so a large public sector organisation could target risk assessment where it mattered.
Life sciences · Linear mixed effects modelsLinear Mixed Effects Models for an Intervention Measured Over Six Occasions
Recovering a defensible effect estimate from repeated measures with missing follow-up, where repeated measures ANOVA could not be used.
Third sector · Factor analysis and ordinal regressionExploratory Factor Analysis and Ordinal Regression on a National Survey
Reducing 75 overlapping questionnaire items to interpretable factors, then modelling an ordinal outcome correctly.
Education · Multilevel modellingMultilevel Modelling of Student Performance Across Twenty Departments
Accounting for students clustered within courses and departments, where ignoring the hierarchy would have manufactured significance.
Public services · Time series forecastingSeasonal ARIMA Forecasting with Intervention Analysis for Resource Planning
Twelve years of monthly demand with seasonality, trend and structural breaks — where simple smoothing methods failed consistently.
Commercial · Dimensionality reduction and clusteringPrincipal Component Analysis and K-Means Clustering for Customer Segmentation
Finding stable segments in 90,000 customer records with no predefined categories and heavily correlated behavioural variables.
Research · Meta-analysisRandom Effects Meta-analysis of Forty-Five Published Studies
Combining heterogeneous evidence into a defensible overall estimate, with publication bias investigated rather than assumed away.
Manufacturing · Generalised linear mixed modelsGeneralised Linear Mixed Models to Identify the Drivers of Production Defects
A quarter of a million production records across six lines and two years, where univariate analysis could not separate interacting process variables.
Healthcare · Reflexive thematic analysisReflexive Thematic Analysis of Forty-Five Staff and Service User Interviews
Building a transparent coding framework across 700 pages of transcripts, where the aim was interpretation rather than counting.
Public services · Framework analysisFramework Analysis Comparing Perspectives Across Several Stakeholder Groups
Thirty interviews and eight focus groups from groups using different vocabulary, compared without flattening what made each distinct.
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