Key Problem type:

$N=$ Noisy

$F=$ Equipment failure

$W=$ Runs warm

$0=$ Odor

Customer type:

$C=$ Commercial customer

$R=$ Residential customer

$An$ air$-$conditioning repair department manager has compiled data $on$ the primary reason for $41$ service

calls for the previous week, $as$ shown $in$ the table. Using the data, make a check sheet for the problem types

for each customer type, and then construct a Pareto diagram for each type $of$ customer.

Job

Number

Proble$\frac{m}{?}$

Customer Type

Job

Number

Proble$\frac{m}{?}$

Customer Type

Job

Number

Proble$\frac{m}{?}$

Customer Type