SO/PD II: The EEI System Operator Test

SO/PD II is the EEI battery for energy control center jobs — system operator, system controller and power dispatcher. It is computer-based, takes about two and a half hours, and is unlike the rest of the EEI catalog in two ways: it ends with a four-quadrant multitasking simulation rather than a written test, and it reports a verdict of "Recommended" or "Not Recommended" rather than an index number.

What is in it

Test	Questions	Time
Analytic Thinking Skills	23	45 min
Mathematical Usage	16	17 min
Reading Comprehension (4 passages)	26	22 min
Multitasking Simulation	4 concurrent tasks	2 trials of 5 min

Analytic Thinking Skills is three sub-sections inside one 45-minute test: seven argument questions, five problem-solving questions and eleven logic-based reasoning questions. The logic-based items are the ones worth knowing about in advance, because they use a three-way answer format — true, false, or indeterminable. That third option is the whole test. You are being asked whether a conclusion necessarily follows from what you were given, and the discipline is refusing to use anything you happen to know about power systems. If the passage does not settle it, the answer is indeterminable, however obvious the real-world answer seems.

Mathematical Usage here is 16 questions in 17 minutes — much more generous than the 7-minute sprint in CAST and MASS, which suggests harder items rather than a speed test. Practising at the tighter pace elsewhere makes this feel comfortable; our Mathematical Usage demo is a reasonable proxy.

Reading Comprehension is 26 questions across four passages in 22 minutes — roughly 50 seconds per question, in line with the other batteries. The Reading demo transfers directly.

The multitasking simulation

This is the part people remember. EEI describes it as measuring how well a candidate can monitor multiple tasks at once and move between them to respond as needed. The screen is divided into four quadrants running simultaneously, and the brochure names all four tasks:

• memorizing alphanumeric codes
• basic three-digit addition
• visually monitoring a needle on a gauge
• identifying audio tones as high or low

There are two trials of five minutes each. The brochure is explicit that the candidate must be able to hear the difference in tones, so this is genuinely an audio test and not a formality — if you have a hearing consideration, raise it with the employer before the day rather than on it.

Two honest caveats. First, EEI does not provide practice material for the multitasking simulation, and neither do we — a simulation built to guess at its parameters would teach you the guess, not the test. Second, what it rewards is not a trick. It is the willingness to accept that you cannot give any one quadrant your full attention, to keep a scan going rather than locking onto whichever task feels most urgent, and to return to the addition after a tone rather than abandoning it. Candidates who fail to switch tend to do so because they got absorbed, not because they were slow.

How it is scored

This is the one EEI battery that does not give the employer a number. The brochure says the total score yields a test result of "Recommended" or "Not Recommended". There is no index, no range and nothing to compare between candidates on the report itself — which also means the usual question about what number you need has no answer here, because there is no number.

That framing is worth taking seriously if you are planning a retake: there is no partial credit visible to you, and no feedback beyond the verdict. Waiting periods between attempts are set by the employer and vary widely; we have collected what utilities publish.

Naming and where it appears

The battery appears under at least four spellings on utility careers pages — "SO/PD II", "SO/PD", "SOPD" and "SO/PDII" — and Southern California Edison catalogs it as test 5209. They are all the same battery.

The jobs it covers are broader than the name suggests. Beyond system operator and power dispatcher roles, one EEI-derived description notes that the battery was developed to cover natural gas controller jobs as well. The development work was done by HumRRO with 17 investor-owned electric companies taking part.

Preparing sensibly

Three of the four components are conventional timed tests, and they are where your preparation time should go. Build the true/false/indeterminable habit deliberately — it is the single most trainable thing in the battery, and it is the part candidates most often get wrong for the wrong reason, by answering from knowledge instead of from the passage. Then get your reading speed and your arithmetic reliable under a clock. Our plant and control-room practice shares the Reading and Mathematical Usage sections with this battery, and Complete access includes them.

Frequently asked questions

How long is the SO/PD II test?

About two and a half hours in total. The written components account for 84 minutes of timed work, and the multitasking simulation adds two five-minute trials plus setup and instructions.

What does "Not Recommended" mean?

It is the battery's negative result. SO/PD II reports only "Recommended" or "Not Recommended", so there is no index score to interpret and no published threshold behind it — the employer receives the verdict.

Can you practice the multitasking simulation?

Not honestly. EEI does not publish its parameters or provide practice for it, so any product claiming to reproduce it is reproducing a guess. Practise the three written components, and go in expecting to scan rather than concentrate.

Is SO/PD II the same as the dispatcher test at every utility?

The EEI battery is shared across consortium members, but some utilities have moved parts of their dispatcher hiring elsewhere entirely — AEP now routes dispatcher and system operator applicants to a video assessment and keeps EEI testing for a short list of nuclear plant roles. Check what your invitation lists rather than assuming.