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 Problem/

Customer Type Job Number Problem/

Customer Type Job Number Problem/

Customer Type 301 F/R 315 F/C 329 O/C 302 O/R 316 O/C 330 N/R 303 N/C 317 W/C 331 N/R 304 N/R 318 N/R 332 W/R 305 W/C 319 O/C 333 O/R 306 N/R 320 F/R 334 O/C 307 F/R 321 F/R 335 N/R 308 N/C 322 O/R 336 W/R 309 W/R 323 F/R 337 O/C 310 N/R 324 N/C 338 O/R 311 N/R 325 F/R 339 F/R 312 F/C 326 O/R 340 N/R 313 N/R 327 W/C 341 O/C 314 W/C 328 O/C

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