The Six-Phase Project Pipeline
This six-phase pipeline is the spine of the whole chapter. It is the working sequence the New Analyst followed in the Opening Vignette and the sequence the chapter applied across the three worked examples. The phases are sequential; the discipline is to complete the deliverables of each phase before starting the next.
Phase 1: Brief. Write the question, universe, method, deliverables, and audience on a single page. Cost: thirty minutes. Saves: between two and ten hours of mid-project rework. Skipping the brief is the single most common cause of two-week projects becoming six-week projects.
Phase 2: Data. Download, cache, and validate the source data using the defensive pipeline of Chapter 7. Document the source URL, the pull date, and any cleaning decisions in the notebook’s opening cells. Cost: a few hours. Saves: every downstream debugging session that would have traced back to a data-loading shortcut.
Phase 3: EDA. Apply the five-layer EDA pass of Chapter 8 to the cleaned data. Generate the profile, distribution, time-series, dependence, and outlier views. The output is the analytical understanding the rest of the project rests on.
Phase 4: Analysis. Execute the analytical method named in the brief: segmentation tables, rolling statistics, a small predictive model, a Monte Carlo simulation. The phase produces the headline numbers and the supporting charts that the memo will reference.
Phase 5: Memo. Write the brief of Section 9.6. Translate the notebook’s charts and tables into prose a non-technical reader can act on. The memo is the deliverable; the notebook is the supporting evidence.
Phase 6: Self-evaluation. Run the notebook against the rubric of Section 9.7. Fix every “no” before the deliverable leaves your hands. The phase costs an hour and is the difference between a deliverable a senior reader signs off on and one returned for revision.
Use this pipeline²¹ whenever you sit down to a finance-domain analytical project. The temptation under deadline pressure is to skip Phase 1, Phase 5, or Phase 6 and go straight from Data to Analysis. Running all six in order, even under deadline, is what keeps a two-week project from becoming a six-week one.