How EDGEBIC Records Every Schedule Change

EDGEBIC records every meaningful schedule change as a permanent, attributed event: the first scheduling, each reschedule, each work-center swap, each manual date override, and each completion, with a timestamp, the person responsible, and a reason where one is required, so you always know who changed a job, when, and why. EDGEBIC by User Solutions treats the history of a plan as data worth keeping, not something that evaporates the moment the schedule updates. For any shop that has ever argued about why a date slipped, that history is the difference between three conflicting memories and one dated record.

Why a Schedule Needs a Memory

A production schedule is not a static document. It changes constantly: rush orders arrive, machines break, priorities shift, and each change ripples downstream. Most tools show you only the current state. Ask them how the plan got there and they have nothing to say.

That silence is expensive. When a customer asks why their order is two weeks late, "the schedule changed" is not an answer. When an auditor asks whether a plan was quietly altered, "trust us" is not evidence. And when two planners remember a decision differently, there is no way to settle it. A schedule with no memory forces you to reconstruct history from email, whiteboards, and recollection.

EDGEBIC gives the schedule a memory. Every change that matters becomes a recorded event.

What Gets Recorded

EDGEBIC captures the meaningful mutations to a schedule as distinct kinds of events:

Each event carries the context that makes it useful:

• A timestamp of exactly when it happened
• The actor who made the change
• A reason, required for the changes where justification matters, such as a work-center swap, a manual date override, or a reopen
• The before-and-after detail: old and new dates, or old and new work center

Because the record is append-only, the application never prunes it. It grows into a continuous, ordered account of how the plan evolved.

Original Dates Are Never Overwritten

There is a second, quieter piece of this that does a lot of work. Every scheduled operation carries three date pairs, not one:

• Its original planned start and end, set once and never changed
• Its current planned start and end, updated on each reschedule
• Its actual start and end, filled in when work is logged

The original dates are the baseline. Because a reschedule never overwrites them, you can always compare where a job was first planned against where it ended up. That comparison is how you measure schedule drift, and it is what lets you explain a slipped date with numbers instead of adjectives. Actuals come from the shop floor, and because completed work is never moved by a reschedule, the actual dates stay a faithful record of what really happened.

A Worked Example: Explaining a Slipped Order

A job was first scheduled to run January 10 to January 15. It is now January 22 and running late, and the customer wants to know why. Instead of guessing, a planner pulls the change history for that job:

The story is now precise and attributed. An automatic reschedule nudged the job two days. A planner then pushed it further because a specific machine was down for a specific reason, and later moved it to a different machine because that machine stayed offline. There is nothing to argue about, because every step has a date, a name, and a cause. The planner walks the customer through it in a minute. And because the original January 10 to January 15 dates are still on record, the planner can also show exactly how far the job drifted from its first plan.

Accountability Without Extra Effort

The important thing about this record is that nobody has to maintain it. Planners do not fill in a log. The events are written automatically by the same actions that change the schedule. Drag a bar to a new date and an override event is recorded. Swap a work center and a swap event is recorded, prompting for the reason at the point of the change. Mark an operation complete and a completion event is recorded.

That means the history is as complete as the work itself. There is no separate discipline to keep up, no log that falls behind because everyone was busy. The accountability is a byproduct of using the software normally, which is the only kind of accountability that survives a busy week on the floor. You review it through the job audit trail in EDGEBIC whenever a question comes up.

Why This Matters for Regulated and Contract Shops

For plants that face audits, whether in medical devices, aerospace, defense, or any contract environment with traceability requirements, the schedule change history is direct evidence. It is append-only, so a job cannot ordinarily be moved without leaving a record, and every reschedule, swap, override, and completion is attributed and timestamped. That is the continuous, tamper-evident trail an auditor expects to see.

Paired with EDGEBIC's user and role controls, which establish who was even permitted to make a given change, the history answers both halves of the accountability question: who could change the schedule, and who actually did. The heritage behind the product speaks to this: User Solutions has delivered scheduling into environments including the US Navy and BAE Systems, where an unexplained change to a plan is not an option.

The Bigger Picture

A schedule change history turns a plan from a snapshot into a record. It changes the questions you can answer. "Why is this late?" stops being a debate and becomes a lookup. "Who changed this?" stops being an accusation and becomes a fact. "How far did we drift?" stops being a guess and becomes arithmetic against the original dates.

None of it requires extra work from your planners, because the record writes itself as they do their jobs. In a shop where schedules change every day, and they always do, having a faithful memory of every change is one of the quiet features that turns out to matter most. It is the foundation under trustworthy rescheduling, honest customer conversations, and clean audits alike.