Time series
3articles
November 2026
3 articles on this page
Data & analytics14 min readForecasting from Vietnam's CPI series: step by step on real data
For finance directors and SME owners who need an inflation assumption for a 12-month budget. The post decomposes Vietnam's real CPI series, forecasts it seven ways and scores each on held-back months. A constant-growth line is hard to beat, and the 2026 fuel surge pulls every forecast off course.
- Data & analytics10 min read
Seasonal sales forecasting in Excel, scored with MAPE
For shop owners and buyers whose monthly sales swing with the seasons while the yearly total climbs. Five steps in Excel on an invented dataset, and a check on when they fail to beat a much simpler forecast.
Data & analytics7 min readForecasting demand: when to ask experts, when to build a model
For a buyer or finance director who must forecast demand for a new product and for a line that has sold for years. With data, start from statistics; without it, use structured judgement such as Delphi. This post maps the choice between the two.