Media &amp; Data

GRP = \text{Reach}\,(\%) \times \text{Frequency}

Total advertising weight of a campaign against the whole audience.

Target Rating Points (TRP)

TRP = \frac{\text{Impressions among target}}{\text{Target population}} \times 100

Advertising weight counted only within the specific target audience.

Television Rating (TVR)

TVR = \frac{\text{Viewers of a programme}}{\text{Total TV population}} \times 100

Share of all potential viewers watching a particular programme.

Cost Per Mille (CPM)

CPM = \frac{\text{Cost}}{\text{Impressions}} \times 1000

The cost of reaching one thousand impressions.

Cost Per Rating Point (CPP)

CPP = \frac{\text{Cost}}{GRP}

How much it costs to buy one rating point of audience.

Click-Through Rate (CTR)

CTR = \frac{\text{Clicks}}{\text{Impressions}} \times 100

Percentage of ad views that result in a click.

Cost Per Click (CPC)

CPC = \frac{\text{Cost}}{\text{Clicks}}

Average amount paid for each click on an ad.

Cost Per Acquisition (CPA)

CPA = \frac{\text{Cost}}{\text{Conversions}}

Average cost to gain one customer or completed action.

Return on Ad Spend (ROAS)

ROAS = \frac{\text{Revenue from ads}}{\text{Ad spend}}

Revenue generated for every unit of currency spent on advertising.

Conversion Rate

CR = \frac{\text{Conversions}}{\text{Visitors}} \times 100

Percentage of visitors who complete a desired action.

Engagement Rate

ER = \frac{\text{Engagements}}{\text{Followers}} \times 100

How actively an audience interacts with content.

Share of Voice (SOV)

SOV = \frac{\text{Your impressions}}{\text{Total market impressions}} \times 100

Your brand’s share of all advertising exposure in a market.

Power Usage Effectiveness (PUE)

PUE = \frac{\text{Total facility energy}}{\text{IT equipment energy}}

How efficiently a data centre uses energy, versus overhead like cooling.

Data-Centre Infrastructure Efficiency

DCiE = \frac{1}{PUE} \times 100

The efficiency of a data centre expressed as a percentage.

Availability (Uptime)

A = \frac{MTBF}{MTBF + MTTR} \times 100

Percentage of time a system is operational.

Bandwidth-Delay Product

NEWAdvanced

BDP = \text{Bandwidth} \times RTT

Amount of data "in flight" on a network link at any instant.

Compression Ratio

CR = \frac{\text{Uncompressed size}}{\text{Compressed size}}

How much smaller data becomes after compression.

Little’s Law

NEWAdvanced

L = \lambda\,W

Relates the number of items in a system to arrival rate and waiting time.