J.I.T. - Just In Time

J.I.T. -Just In Time

• The basic elements of JIT were developed by Toyota in the 1950s.

• This evolved into the Toyota Production System.

• Adopted, as part of ‘Lean manufacturing’, by many process manufacturers

History

What is JIT and why do we do it?

Supplier Stock Process

• Minimise level• Working capital• Cashflow• Space• Avoid

obsolescence

• Demand driven• Easy to plan• Continuous• Flexible• Part of Lean

• Aligned to plan• Continuity of

supply critical• Quality control• Spread risk

What is JIT and why do we do it?

• This theory is applicable to repetitive manufacturing processes• Ensure that the right parts are in the right place at the right time• Minimise waste by reducing inventory (increasing inventory

turnover)• Ensure the use of a stable plan (no late/ rush orders)• Ensure quick set up times on all production lines• This allows short production runs & small purchasing lot sizes• Use preventative maintenance plans (during non production time

to avoid unexpected breakdowns)• Ensure that there is a well trained flexible workforce (to minimise

line manning issues)• Implement a supplier quality assurance programme (to ensure

there are no issues with raw materials)

• Each order is exploded into its component parts• Production orders are raised and scheduled on the production

plan• Raw material orders are raised by the Buyers/ Resource

Planners• Raw material delivery schedules are agreed with the suppliers• Materials are stored close to their point of use• Production personnel request materials using a computerised

Kanban system• A preventative maintenance system is used to maintain

production lines• A vendor appraisal/ supplier award system is used to maintain

quality/ cost/ service

Case Study – Edrington

Production Order - sample

Break out production order

Delivery Schedule

Dry Goods Storage

Kanban

RDT – Picking List

Vendor Appraisal95.4 95.0

92.290.8 89.6 89.5 89.2 89.1 88.9 88.5 87.9 87.7 87.3 86.4 85.5 85.3 84.6

83.081.5 81.3 79.9 78.9 78.1

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Corrugate

Haven

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Beam

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Gilm

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JC R

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John Watson

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Erben

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