22.16 Consistency Check

A consistency check is a targeted review pass that verifies details established at one point in a manuscript remain accurate and unchanged everywhere else that manuscript refers to them, catching contradictions that arise when a novel's length and the extended time span of its drafting make it easy for a writer to lose track of previously established facts.

Why Consistency Errors Occur

A novel typically contains far more specific, interdependent detail than a writer can hold in active memory while drafting a later chapter: a character's eye color mentioned once in chapter two, the exact number of siblings a secondary character has, the day of the week on which a pivotal scene occurs, the layout of a house that a character moves through in several separate scenes written months apart. Because these details are usually established once, in passing, and not deliberately revisited, they are easy to state differently later without the writer noticing the contradiction, particularly across a drafting and revision process that may span months or years and involves the writer's attention moving repeatedly between different parts of the manuscript.

Categories of Detail Checked

Physical description. Character appearance — eye color, height, scars, hairstyle, clothing described in a specific recurring outfit — is checked against every instance it is mentioned, since a detail changed even briefly, in a single unedited passage, produces a contradiction a careful reader is likely to notice.

Character backstory and relationships. Facts about a character's history, family relationships, age, and past events referenced across a manuscript are checked to confirm they remain the same each time they are mentioned or implied, including in dialogue, where characters may reference shared history that must remain consistent with how that history is depicted elsewhere.

Timeline and chronology. The sequence and spacing of events — how much time passes between scenes, which day of the week or season a scene occurs in, the character's age at a given point in the story — is checked against a constructed timeline, since chronological errors are especially easy to introduce when scenes are written out of order or restructured during revision.

Setting and geography. The physical layout of recurring locations — the number of rooms in a house, the direction a character travels between two points, the relative distance between named places — is checked for consistency, particularly in scenes written far apart in the drafting process, where a writer may unconsciously reimagine a space differently the second or third time it is described.

Object and possession tracking. Items with narrative significance — a specific weapon, a piece of jewelry, a letter — are checked to confirm their described condition, location, or ownership remains consistent with earlier and later references, since an object that changes hands or appearance without explanation can create confusion about plot events the writer did not intend.

Plot logic and cause-and-effect. Beyond individual facts, a consistency check also considers whether events later in the manuscript remain logically compatible with what has already occurred — whether a character has information they were never shown learning, or acts in a way inconsistent with constraints established earlier in the story, such as an injury that should still be limiting their movement.

Techniques for Performing a Consistency Check

Constructing a reference document. Because the volume of specific detail in a novel exceeds what can reliably be checked from memory, many consistency checks rely on a compiled reference — sometimes part of the same style sheet used for spelling and formatting decisions, sometimes a separate document — listing key facts about each character, location, and timeline event as they are established, so each new mention can be checked against a fixed record rather than against the writer's recollection of earlier chapters.

Tracking a manuscript-wide timeline. Building a chronological outline of every dated or datable event in the manuscript, including implied time gaps between scenes, allows a systematic check of whether the sequence and pacing of events remains internally coherent across the full length of the story.

Element-specific rereads. Rather than checking consistency during a single general read-through, some consistency checks isolate a single element — every scene featuring a particular character, every appearance of a specific location — and review those instances together in sequence, since related details are easier to compare directly against one another than to hold in memory across a full read of the entire manuscript.

Cross-referencing reader or editor notes. Because a fresh reader encountering the manuscript for the first time has no prior investment in a particular version of a detail, external readers and editors are often relied upon to catch consistency errors the writer, too familiar with the intended version of events, has stopped noticing.

Position in the Editing Process

A consistency check is generally performed after major structural revision is complete, since scenes cut, added, or reordered during structural revision frequently create new consistency problems — a fact established in a scene that is later moved earlier or later in the timeline, for instance — and checking consistency before structural changes are finalized risks the check itself becoming outdated by subsequent revision.