Tool Crib

What Is a Tool Crib?

Certain items are too portable and too easily lost to be controlled by counting them periodically. Cutting inserts, gauges, hand tools and measuring equipment disappear one at a time, without any single loss being worth investigating, and a stocktake performed months later can only report an aggregate difference nobody can attribute.

Controlling at the point of issue solves what counting cannot. Items are handed out against a record naming who took them and for which job, and in many cases against an expectation of return, so accountability attaches at the moment the item leaves rather than being reconstructed afterwards. The practical design question is where to draw the threshold, since requiring a record for every washer paralyses the shop floor and is abandoned within months. Most workable arrangements control the higher-value and returnable items individually and manage the remainder through consumption ratios, which measure the aggregate without recording any single issue.

Which Sectors Use Tool Crib and Why

The arrangement belongs to operations where portable, valuable tooling is issued to people rather than fixed to machines.

• Engineering and machine tool manufacturing, holding cutting tools, inserts and gauges in constant circulation.
• Automotive component plants, on the same pattern and at higher volume.
• Heavy fabrication and shipbuilding, where hand tools and measuring equipment are issued across large sites.
• Maintenance functions in any process industry, where technicians draw tooling for jobs and return it afterwards.
• Construction, applying the same control to power tools and site equipment.
• It is not used in assembly operations where every tool is fixed to a station, nor in warehousing and retail, where the equipment in circulation is small in value and narrow in range.

How Tool Crib Works in Practice

1. A controlled store is established within the workshop with a named keeper, holding tooling, gauges, inserts and measuring equipment.

1. A value threshold is set. Items above it are issued individually against a record naming the person and the job; items below it are drawn freely and controlled in aggregate.

1. Returnable items are issued with a stated expectation of return, so the record itself prompts somebody to ask where they went.

1. Usage under the threshold is watched as a ratio to production, inserts per thousand components for instance, which captures the total drawn without any individual withdrawal being logged.

1. Periodic counting covers the higher-value and returnable population properly and samples the remainder. Differences on controlled items are traced through the issue records; movement in the consumption ratio is investigated against production conditions before anything is concluded.

Tool Crib: A Worked Example

A Rajkot machine shop holds tooling in a controlled store rather than on the floor.

Three categories behave like three different asset classes and cannot be verified the same way. Consumable cutting tools are stock: they are issued, used up and never come back. Gauges are returnable and are also useless if out of calibration, so a count that finds all 310 present proves less than half of what is needed. Fixtures are closer to fixed assets, sitting with a machine for years. A crib treated as one homogeneous store typically counts everything and calibrates nothing, which leaves Rs 26 lakh of instruments present, accounted for and not fit to measure with.

Common Mistakes With Tool Crib

The control fails at the threshold rather than at the counter.

• Demanding paperwork for every minor item, which stalls production, gets quietly dropped inside a quarter, and leaves nothing behind it.
• Setting the threshold once and never revisiting it, so inflation gradually moves whole categories below the line.
• Holding the crib open without a named keeper, which removes the accountability the arrangement exists to create.
• Controlling nothing because individual values are small, when the annual aggregate reaches a figure that would never be tolerated elsewhere.
• Issuing returnable items without recording an expectation of return, so nothing prompts anybody to ask where they went.
• Counting periodically and adjusting the difference, when issues that were never recorded cannot be traced and the adjustment explains nothing.
• Omitting consumption ratios, which are the only practical measure for the items below whatever threshold is set.

Related Stock Audit Terms

The accounting record behind the store carries the values, so stores ledger is the entry to read next. Every other term in this cluster is listed in the stock audit terms, grouped by the part of the work it belongs to.