A six-section planning guide for Singapore procurement and operations teams on structuring wafer reclaim paperwork, cut-off decisions and reconciliation when a reclaim review straddles two accounting periods, with a worked hypothetical example.

# Why a reclaim review that crosses a period boundary needs its own paperwork plan

A wafer reclaim review rarely starts and finishes inside one reporting period. Material is collected in one month, inspected in the next, and the commercial outcome may only be agreed after the books have closed. When that happens, the paperwork has to answer two different questions at once: what physically happened to the material, and which accounting period should carry the value.

Procurement and operations teams in Singapore often own both halves of that question. Operations knows what left the fab floor and when. Finance knows which period the entry lands in. If the reclaim file is built only for the physical movement, the period split becomes a reconstruction exercise at month-end, and reconstructions are where discrepancies appear.

The practical answer is to treat the period boundary as a design input, not an afterthought. Before the review begins, decide which documents will carry the cut-off date, who signs them, and how a lot that is in transit on the boundary will be described. This guide sets out that planning sequence, using a worked hypothetical example rather than a claim about how firms generally operate. Suggested timings and checklist scores below are author heuristics for planning, not established research findings.

# Map the four document types before you map the dates

Reclaim paperwork is easier to control when you separate it by function rather than by department. Four document types usually cover the whole chain, and each has a different relationship to the period boundary.

The first is the collection record: what was picked up, from which site, in what quantity and condition. This is the document most exposed to a period split, because collection can happen on the last working day of a period while receiving inspection happens in the next. The second is the receiving and inspection record, which confirms condition and classification. The third is the commercial document, whether a service confirmation, credit note or internal transfer record. The fourth is the reconciliation sheet that ties the first three together.

For the collection stage specifically, the practical questions are about custody and timing: who signs at the gate, what time is recorded, and whether the record states that material is in transit rather than received. Teams that plan wafer scrap collection as a logistics task alone often discover the timing gap only when finance asks for a cut-off position.

A useful planning habit is to give each document type a single owner and a single date field that everyone agrees means the same thing. Ambiguity about whether a date means dispatched, received or accepted is a common source of period misallocation, and it is cheap to remove at the planning stage.

Related resource: wafer recycling services.

Related resource: wafer scrap collection.

# Set the cut-off rule and write it down before the review starts

Operations should get the period-end reporting instructions from finance before preparing the reclaim register. Record the instruction alongside the facts, including which documents the reviewer needs and who is responsible for any follow-up.

Capture dispatch, receipt and classification as separate milestones. The dispatch record shows when the material left your site. The receipt record shows when the receiving site took it in. The inspection record shows when classification became available. Record a missing milestone as pending and name the person who will follow it up. Finance can then apply its reporting policy using the full timeline.

Write the reporting instructions into the review plan and walk through a sample line with finance. State how operations should flag an in-transit lot or a provisional classification. Ask who will review the line after the final inspection, and record when the inspection result is due.

This is also the point to decide how the review will describe material that is not yet classified. A lot awaiting inspection is not the same as a lot confirmed as non-usable, and the paperwork should not blur the two. Clear language at the boundary reduces the number of items that need to be reopened in the following period.

# Worked hypothetical example: a lot collected on the last day of the period

Consider a hypothetical Singapore fab that schedules a reclaim review across two accounting periods. On the last working day of Period A, a collection is completed for a batch of non-usable silicon. The material leaves the site that afternoon. Receiving inspection at the reclaim partner takes place three working days later, in Period B. Classification is confirmed in the second week of Period B, and the commercial confirmation follows.

At the Period A handover, the operations team attaches the dispatch record and marks receipt, inspection and commercial confirmation as pending. In Period B, the reviewer appends each document as it arrives and keeps the actual dates. Finance reviews the complete timeline against its own reporting policy.

Agree before the close which events the team should capture and which documents it needs to chase. This gives the next reviewer a clear trail even when the records arrive on different days. The practical safeguard is a boundary log: one line per lot that crosses the period end, showing dispatch date, receipt date, classification status and the rule applied.

For teams that handle mixed streams, it helps to separate the paperwork by material pathway. Non-usable silicon from fabs, wafer manufacturers, solar cell companies and chip packaging facilities can follow different routes, and San Techno’s silicon recovery work covers those source types, which is a useful reminder to label each lot by origin and route rather than lumping them into one schedule.

Related resource: silicon scrap recycling.

# Reconcile quantities, values and status in that order

Reconciliation is where period-split files most often go wrong, usually because quantity, value and status are checked together in one pass. A staged approach is more reliable.

Start with quantity. Tie the collection record to the receiving record and explain every difference, including moisture, breakage, packaging weight and sampling. A quantity difference that is not explained at this stage will reappear as a value difference later, and by then the physical evidence may be gone.

Then match the commercial documents to the lot. Record when the credit or service confirmation arrived and check that it uses the same lot identifier as the collection record. Refer any missing or conflicting values to finance with the relevant references attached.

Finally reconcile status. Confirm that every lot in the boundary log has a current classification and that lots awaiting inspection are flagged rather than silently treated as confirmed. This is also the stage to check that the downstream description of the material is consistent. Material processed into reusable raw materials for solar wafers and cells should be described in the same terms across the collection record, the inspection record and the commercial document, so that the period file tells one story rather than three.

A short reconciliation checklist with a simple pass or flag per line is usually enough. Treat any scoring as an internal planning aid, not as an audit opinion.

# Close the loop: handover, retention and the next period

The final section of the review plan should cover what happens after the period closes. A period-split file is only useful if the next period can pick it up without re-interviewing everyone involved.

Prepare a handover note that lists open items: lots in transit, provisional classifications, pending commercial confirmations and any quantity differences still under investigation. Give each item an owner and a target resolution date. Keep the boundary log with the handover note so the next period’s team can see exactly which lots were carried forward and why.

Agree a retention approach for the underlying records, including collection records, inspection records and reconciliation sheets, and make sure the file naming reflects the period and the lot identifier rather than the person who prepared it. Where material is ultimately routed for disposal or recovery, keep the routing decision with the same lot identifier so the chain remains traceable from collection to outcome.

If your review touches material that may need to leave the site under controlled conditions, plan the silicon wafer disposal documentation in the same cycle as the commercial paperwork rather than after it, so that the period file contains the full chain.

Finally, schedule a short review of the boundary decisions themselves. Which rule was applied, how many lots crossed the boundary, and which items were reopened. That record is the most useful input for the next period’s plan, and it costs very little to produce while the details are still fresh. For a supplier review, send the lot references and the dates that determine the cut-off so the supplier can respond against the same records.

Related resource: silicon wafer disposal.

# About San Techno

San Techno Pte Ltd is a Singapore-based company working in semiconductor and solar materials, silicon recovery, specialized power module development, and botanical extracts under the ST GREEN brand.