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End To End Lean Transformation for Fresh Vegetable Growing and Processing
Client: Houston’s Farm
Location: Hobart, Australia
This case study involved pioneering application of lean manufacturing concepts to the end to end process of fresh vegetable production from sowing to shipping. This project is ongoing.
Our customer is a large commercial grower and processor of fresh cut leaf vegetables for pre-packed salad. They farm over 1000 hectares of fancy lettuces and herbs and operate processing plants in Hobart and in Brisbane. Our customer has a market-leading reputation for quality.
Fresh leaf vegetables such as lettuce have an extremely short shelf life. The challenge is increased by the location in Tasmania. This requires product to be shipped daily to the Australian mainland. The location also places our customer at a serious disadvantage to its mainland competitors. As the market for pre-packed salad has matures, they have recognised the need to reduce unit costs through improved productivity and reduced waste throughout the supply chain from sowing through to delivery to the customer distribution centre.
TXM mapped the end-to-end process of producing pre-packed salads from receipt of seeds and seedlings through to delivery of finished product to mainland customers. This highlighted key areas of waste and provided a roadmap for improvement.
TXM then focused on coaching improvement in the two processing plants and farm. Initial focus was on the packing process to improve organisation, using 5S and to improve filling and packaging uptime and productivity using standard work and problem solving. Standard methods were developed to pack product, layout of packing lines and finished product staging was improved and key causes of filling machine downtime addressed.
Initial focus in the farm was on harvesting. The lack of a standard method for harvesting lead to inconsistent levels of productivity and quality. Also poor organisation of product pick up lead to product degradation and loss when it was left in the fields for too long. Standard work for harvesting and product transport was developed to ensure that a consistent result was achieved with optimum productivity.
Sowing and growing was also the focus of improvement with the 5S approach adapted to ensure that routine crop checking and irrigation was carried out correctly.
The supply chain is the final are of improvement with lean approaches being used to improve planning in order to reduce waste (dumping or destruction of unwanted crops) and the need to transport crops around Australia in order to balance demand.
The lean project is ongoing and significant challenges remain, however our customer has already made significant gains.
On time delivery has been increased to 100% and maintained at that level for several months. This is critical as missed delivered usually end up being scrapped due to the limited shelf life.
A productivity improvement of around 20% has already been achieved in filling and packaging through better layout and reduced downtime. This has also lead to substantial savings in rework and wasted packaging.
In the farm, gains have been made in harvesting productivity and focus is on improving yields through standardisation to ensure compliance with optimum processes for sowing and irrigation.