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Intro to Decomposition: Creating a Three Factor Model (Cups/Server) (Servers /Hour) (Hours)

Intro to Decomposition: Creating a Three Factor Model (Cups/Server) (Servers /Hour) (Hours). Ted Mitchell. We have seen that both. Number of Servers as an Input and Number of Café Hours as an Input Have meaningful impacts on the Outputs of 1) Number of Cups S old, Q

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Intro to Decomposition: Creating a Three Factor Model (Cups/Server) (Servers /Hour) (Hours)

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  1. Intro to Decomposition:Creating a Three Factor Model(Cups/Server) (Servers/Hour) (Hours) Ted Mitchell

  2. We have seen that both • Number of Servers as an Inputand • Number of Café Hours as an Input • Have meaningful impacts on the Outputs of • 1) Number of Cups Sold, Q • 2) Dollar of Sales Revenue, R • 3) Dollars of Gross Profit, G

  3. When we consider the • Explicit impact of hours of operation, H, we leave the number servers implicit and constant • When we consider the number of servers, S, we leave the number of hours implicit and constant

  4. We wish to have both made Explicit • Number of Servers, S, and the Number of Store Hours, H, made explicit in the same analysis

  5. Creating a Three Factor Model • Requires • A process of expansion • A process of aggregation • A process of decomposition

  6. Step 1 • Identify the Two Factor Model you wish to expand into a Three Factor Model and which previously implicit variable is to be made explicit • Cups sold, Q = cups per hour x hours, H Cups Sold, Q = (Q/H) x H • Expand the cups per hour machine to make the number of servers explicit, S

  7. Step 2 • Introduce the variable to be made explicit as unity into the Two Factor model • (Number of Servers, S) /(Number of Servers, S) = Unity • S/S = 1 • Cups Sold, Q = (Q/H) x 1 x Hours, H • Cups Sold, Q = (Q/H) x (S/S) x Hours, H

  8. Step 3 Aggregate the Expansion Factors • Cups sold, Q = (Q/H) x (S/S) x Hours open, H • Cups Sold, Q = [(QxS) / (HxS)] x Hours open, H • r = [(QxS) / (HxS)] is an ugly and large conversion factor

  9. Step 4 Decompose the Ugly Aggregated Conversion Factor • Into two conversion rates • [(QxS) / (HxS)] = (Q/S) x (S/H) • Cups Sold, Q = (Q/S) x (S/H) x Hours, H • where • (Q/S) = Conversion Factor #1 = (cups sold per server) • (S/H) = Conversion Factor #2 = (number of servers per hour) • H = Input Factor = (Number of Hours, H

  10. Three Factor Marketing Machine • Model that makes the number of servers, and the number of operating hours explicit elements in the Marketing Machine

  11. Three Factor Machine Note: The original rate of Cups per Hour is lost and has been replaced by two new rates: Servers per Hour and Cups per Server.

  12. Many people think of this as decomposing the original rate • The Rate of (Cups per Hour) into • (Cups sold per Server) x (Servers per Hour) • But this is inaccurate • Reorganize the 3 Factor Machine as an identity of rates • Q = (Q/S) x (S/H) x H • Divide both sides by H • (Q/H) = (Q/S) x (S/H)

  13. The other Outputs of the Two-Factor Models can be expended as well • 1) Output: Dollars of Sales RevenueRevenue, R = (dollar sales per server) x (servers per hour) x number of hoursR = (R/S) x (S/R) x H • 2) Output: Dollars of Gross ProfitGross Profit, G = (gross profit per server) x (servers per hour) x (number of hours, H)G = (G/S) x (S/H) x H

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