forecasting
a business process, assessing the probable outcome using assumptions about the future
time series analysis
using past data to predict future sales
what does it predict
future sales of products
effect of promotion on sales
possible changes in market size
how sales will fluctuate
how is %change calculated
difference/original (x100)
4 components that a business observes
trend (pattern indicated from figures)
seasonal fluctuations
cyclical fluctuations (highs and lows in sales figures)
random fluctuations
limitations
only an assumption