Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Customer and value evaluation system.
| Target | Dimensionality | Index | Definition of indicator |
| Customer value evaluation | Personal value | R (recency) | Most recent purchase time |
| F (frequency) | Purchase frequency | ||
| Social network value | M (monetary) | Total consumption | |
| I (influence) | Influence on other customers |
