Shift Handover Process in PCB Production

Shift handover is the ten minutes where one crew tells the next what is running, what is waiting and what is wrong, and it is one of the most reliable sources of lost production in a board shop. Jobs are left in an uncertain state, a bath is at the end of its life without anyone knowing, or a parameter was changed and the change was not written down. A handover process does not need to be elaborate; it needs to be regular, written and short enough that it actually happens on a busy shift.

What Goes Wrong Without One

The failures caused by a poor handover share a pattern. Work is continued on a lot that should have been held, a machine is run with a setting that was changed for a reason nobody remembers, or a customer request made in the afternoon is not passed on and the first shift of the next day ships the wrong packaging. None of these is a difficult technical problem and all of them are expensive.

The hidden cost is the time spent reconstructing the situation. Without a handover record, the incoming supervisor has to ask three people and read a traveller, and the answers are usually partial. Ten minutes of structured exchange removes an hour of reconstruction, and it also removes the argument about what was said, because the record is written rather than remembered.

The Handover Checklist

A handover checklist carries the same categories every time: what is running, what is waiting, what is held and why, what has changed since the last shift, and what the next shift must do first. Those five items are enough for a board shop, and the discipline of using the same ones means nothing important is left out because it happened to slip someone’s mind.

The list should be short enough to complete in a few minutes and specific enough to be acted on. A line that says the plating line is running normally is of no use, while a line that names the lot, the bath and the analysis that is due is immediately actionable. The checklist should live on the board at the area it describes, not in an office file, and it should be signed by both the outgoing and the incoming person.

Shift Communication Discipline

Shift communication works best when it is a conversation with a document rather than a document alone. The outgoing person walks the area with the incoming person, points at the actual lots and machines, and hands over the sheet at the end. Walking the floor takes five minutes and transfers a great deal of context that no written record can carry, particularly about the condition of equipment and the state of the work in progress.

It also helps to name a single owner for the handover at each area. When everyone is responsible the handover happens informally and inconsistently, while a named person who must sign gives the process a natural home. The role should rotate rather than sit with the supervisor, because the person who runs the equipment knows more about its state than anyone else on the shift.

Holding Work and Unusual Events

Work that has been held is the most important item on any handover, because a hold that is not communicated is simply a defect waiting to be shipped. The record should state the reason for the hold, who applied it and what is required to release it, and the hold should be physically visible on the material so that nobody has to consult a document to see it.

Unusual events deserve the same treatment. A machine that was stopped for a suspected fault, a bath that was topped up outside its normal schedule, a parameter that was adjusted to correct a drift: each of these should appear in the handover even when the immediate problem has been solved, because the underlying condition usually has not been. Events that are not recorded are rediscovered by the next shift as a surprise at the least convenient moment.

Making Continuity Real

Production continuity is the property of the process, not of the people. It exists when the state of the work and the equipment can be understood from the records rather than from memory, which means that a new shift, a new operator or a new supervisor can pick up the flow without reconstructing it. A handover process is the main mechanism that produces this property, and it is worth measuring whether it is achieved.

One simple measure is the number of queries that reach the previous shift after handover. If the outgoing supervisor is regularly telephoned to ask what was meant, the record is not good enough. The other measure is the number of lots whose status cannot be established within a few minutes from the record alone, and both are easy to count informally and to improve deliberately.

Connecting to the Records

The handover sheet should connect to the batch record rather than replace it. The lot number on the handover is the same lot number on the traveller, and the parameter change is recorded with the fabrication notes for the batch. That connection is what allows a later question about a shipment to be answered from the records rather than from the recollection of the crew on duty at the time.

It also allows the process flow to be audited against reality. If the handover sheets regularly mention a step that the flow does not show, the flow is out of date. This is a useful early signal, because a process that has quietly changed shape usually appears first in the informal records of the people who run it.

Practical Rules

Use the same short checklist every time, walk the area together, and sign the sheet at both ends. Record every hold, every unusual event and every parameter change, and make the status of each lot readable from the record alone.

Keep the handover conversational and the document simple, because a process that takes half an hour will be skipped on the days it matters most. Review the quality and delivery data for problems that trace back to a handover, and treat each one as evidence that a specific item belongs on the checklist rather than as an individual mistake to be corrected.

Additional Considerations for This Build

Practical attention to production handover pays for itself here, because it decides whether the finished board behaves as the drawing intended. Where the requirement is not stated on the fabrication drawing or in the assembly notes, the shop has to assume a default, and that default is rarely the value the design was simulated with. Stating production handover explicitly, together with the tolerance that applies, removes the assumption and keeps the result predictable from batch to batch.

Process Control and Verification

On a design of this kind, handover checklist is the item that decides how the rest of the board is arranged. Keeping a sample from the panel turns a dispute into a measurement, because the same coupon can be re-examined by both parties without rebuilding the batch. Reviewing the design before the data is released is cheaper than correcting it after the panel is in the tank, because every step downstream inherits the decision made at the front end.

FAQ

How long should a handover take? Around ten minutes, including a short walk of the area. A longer handover is usually a sign that the day’s problems were not managed earlier.

Should the handover be written or verbal? Both. The walk transfers context that a document cannot, and the sheet makes the state of the work readable to anyone who arrives later.

Who should own the handover? A named person at each area who signs it, rotating among the crew rather than sitting permanently with the supervisor.