Scenario: A supervisor sends Party A to get a set of dial indicator readings from a vertical mounted pump. He/she returns with only the readings from the east/west plane. Both indicators were zeroed on the east side and showed +.006" (face), and .024" (rim) on the west side. The face indicator travels in an 8 1/2" circle.

Realizing this wasn t enough information, the supervisor sends a second person (Party B) to get a set of readings from the same pump. Party B returns with this information: Both indicators were zeroed on the north side and the readings on the south side showed +.010" across an 8 1/2" face while the rim reading was ?.026" on the south side. (Party B and Party A both have about the same amount of experience).

Now the pump is running and the supervisor is stuck with two sets of incomplete readings. The plan was to get the readings, run the pump for a time, and have a ready set of N/S, E/W moves calculated along with a set of shims for all the motor feet during an upcoming shut down. And the supervisor is desperate for a single, valid set of indicator readings with which to have the numbers people (engineers) calculate the shim packs and lateral moves. (All the other variable factors are known via various drawings).

So he/she, the supervisor, desperate with nothing to lose, sits down with the eight known numbers and attempts...