What Attorneys Should Know About Judge Assignment

The judge assigned to your case can significantly influence the outcome. Yet many attorneys treat assignment as a random event beyond their control. Understanding the mechanics of judicial assignment — and the limited tools available to influence it — is a critical professional skill.

How Judges Get Assigned

Random Assignment Systems

Most modern courts use some form of randomized assignment to prevent forum shopping and ensure impartiality. Methods include:

• Computerized random assignment — The dominant system in federal courts and most large state courts
• Rotational calendars — Cases assigned based on filing date and available judges
• Master calendar systems — A single judge handles preliminary matters before assignment to a trial judge
• Direct calendar systems — One judge handles the case from filing through disposition

Factors That Influence Assignment

Even within random systems, several factors affect which judge you draw:

• Case type — Many courts have specialized divisions (criminal, family, civil complex, probate)
• Related cases — Cases involving the same parties or issues may be assigned to the same judge
• Recusal conflicts — Judges with conflicts are automatically excluded from the assignment pool
• Judicial availability — Judges on vacation, at conferences, or managing heavy trial schedules may be temporarily excluded

Peremptory Challenges and Disqualification

CCP 170.6 — California's Peremptory Challenge

California Code of Civil Procedure Section 170.6 allows each side one peremptory challenge — the right to disqualify an assigned judge without stating a reason.

Key rules:

• Must be filed before the judge makes any substantive ruling
• Timing varies by case type (typically 10-15 days after assignment notice)
• Can only be used once per side per case
• The replacement judge cannot also be challenged under 170.6

Cause Challenges — CCP 170.1

If you have evidence of actual bias or conflict, you can seek disqualification for cause:

• Financial interest in the outcome
• Personal bias or prejudice
• Prior involvement as an attorney in the case
• Personal knowledge of disputed facts

Strategic Considerations

When to Use a Peremptory Challenge

Use your 170.6 challenge strategically:

• When research reveals the assigned judge has a strong pattern against your case type
• When the judge has previously ruled against your client in related matters
• When you have reliable intelligence about unfavorable judicial tendencies

When NOT to Challenge

• Never challenge blindly — research first
• Consider who might replace the assigned judge
• A moderately unfavorable judge you understand may be better than an unknown replacement
• Challenging can signal weakness to opposing counsel

Multi-Defendant Cases

In cases with multiple defendants, each party typically gets one peremptory challenge. However, courts may limit cumulative challenges to prevent parties from cycling through every judge on the bench.

Federal Court Differences

Federal courts generally do not allow peremptory challenges. Disqualification requires showing actual bias under 28 U.S.C. Section 144 or recusal under 28 U.S.C. Section 455. The standard is higher and the process more formal.

Research Before You Decide

Before making any challenge decision:

• Use JudgeFinder to research the assigned judge's background
• Review recent rulings in similar cases
• Consult with colleagues who have appeared before the judge
• Consider the full roster of potential replacement judges
• Weigh the strategic signal that a challenge sends

Conclusion

Judge assignment is not entirely within your control, but it is not entirely outside of it either. Understand the system, do your research, and use the tools available to you strategically. Informed decisions about judicial assignment are a hallmark of effective litigation practice.