How SUTL Streamlined Purchase Order Processing with AI-Powered PO-to-SO Automation

In most B2B organisations, you will not be a stranger to purchase orders and sales orders. A purchase order is a buyer’s request to buy goods, while a sales order is a seller’s confirmation to supply them to manage trade.

Typically, a purchase order (PO) is sent by a buyer to request items, a sales order (SO) is sent by a seller to confirm the request, and both list the same prices and quantities.

Processing customer purchase orders remains a manual, repetitive task that consumes valuable time and resources.

As businesses grow, increasing order volumes, varying document formats, and complex business requirements can quickly turn routine order processing into an operational bottleneck.

Seeking a more efficient and scalable approach, SUTL Group of Companies partnered with Aristou to automate its Purchase Order (PO) to Sales Order (SO) workflow using Microsoft Power Automate, AI-powered document processing, and Microsoft Dynamics 365 Business Central.

Today, validated purchase orders can be converted into sales orders in under 2 minutes, which would manually take over 20 minutes- a 90% reduction in processing time. This significantly reduces manual effort while improving accuracy, consistency and operational efficiency. 

The Challenge

SUTL operates across multiple business units and serving a diverse customer base and also receives purchase orders in a wide range of formats. Each purchase order previously required manual review, validation, and entry into Microsoft Dynamics 365 Business Central before a sales order could be created.

The process was not only time-consuming but also introduced opportunities for human error and inconsistencies, particularly during periods of higher order volumes.

Some of the key challenges included:

• Different purchase order layouts across customers

• Manual extraction of order information

• Validation of customer records, item references, and currencies

• Duplicate purchase order checks

• Time spent resolving data inconsistencies and exceptions

As order volumes increased, the manual process became increasingly difficult to scale while maintaining efficiency and service quality.

Objective:

SUTL’s objective was clear: Automate the conversion of customer purchase orders into sales orders while preserving the robust validation controls already established within Microsoft Dynamics 365 Business Central.

The solution needed to support multiple business units, accommodate various customer document formats, and ensure every transaction remained accurate, traceable, and compliant with existing business rules.

Aristou’s Solution

To address these challenges, Aristou designed and implemented an intelligent automation solution powered by Microsoft technologies, combining:

• Microsoft Power Automate

• AI-powered document processing

• Microsoft Dynamics 365 Business Central integration

• SharePoint document management

• Automated validation and audit reporting

The automated workflow now performs the following processes:

1. Receives customer purchase orders.

2. Uses AI to extract relevant order information.

3. Validates customer, item, and currency information against Business Central.

4. Detects duplicate purchase orders.

5. Automatically generates a Sales Order.

6. Records transaction details for audit and reporting purposes.

Rather than replacing existing ERP controls, the solution complements Business Central by combining AI-driven document processing with structured validation checkpoints to ensure reliable and accurate transactions.

Aristou’s Challenges: Navigating Real-World Complexity

While automating a workflow may appear straightforward in theory, real-world business processes often introduce complexities that require careful planning and refinement from the Aristou team, led by Lim An Ni.

Throughout the project, the solution Aristou designed was to accommodate varying elements, such as:

• Customer purchase order formats

• Vessel name requirements

• GST and non-GST products

• Multiple currencies 

• Customer-specific item references

• Documents with inconsistent layouts or varying image quality

To improve extraction accuracy, the AI model was continuously trained using real business documents while the automation logic was refined to reflect SUTL’s operational requirements.

The project also reinforced an important lesson for Aristou and any organisation embarking on automation: AI performs best when supported by clean, well-maintained master data and clearly defined validation rules. 

An Ni required the assistance of the customers to provide timely, updated accurate master data, maintaining clearly labelled item descriptions, and ensuring data within Microsoft Dynamics 365 Business Central. 

This ensures the AI model to perform at its full potential while helping to minimise implementation delays and maximise long-term automation success. 

In addition, Anni emphasises that having strong data governance remains fundamental to achieving sustainable automation outcomes.

4 Key Business Outcomes

Following implementation, SUTL realised measurable improvements across its order management process.

• Faster Order Processing

Validated purchase orders can now be converted into sales orders in under two minutes, significantly reducing processing time and enabling faster customer response.

• Reduced Manual Effort

By automating repetitive data entry, employees can dedicate more time to value-added activities rather than administrative tasks.

• Improved Accuracy

Automated validation ensures customer records, purchase order numbers, currencies, and item references are verified before transactions are created, reducing processing errors and rework.

• Greater Visibility and Auditability

Every transaction is recorded as part of a structured audit trail, providing greater transparency while supporting governance and compliance requirements.

Most importantly, the solution provides SUTL with a scalable foundation that can support future automation initiatives as the organisation continues its digital transformation journey.

Customer Case Study: SUTL’s Experience with Aristou

Technology delivers its greatest value when it solves real business problems. Following the successful implementation of the PO-to-SO automation solution, we spoke with Si Yao from SUTL Group of Companies to learn more about the project’s impact and their experience working with Aristou.

1. Addressing a Growing Operational Challenge

For SUTL, manually converting customer purchase orders into sales orders had become increasingly resource intensive as business volumes grew.

“The process to convert a customer PO to an SO in Business Central was labour-intensive, susceptible to human error and created operational bottlenecks across sales, customer service and fulfilment functions. This is especially evident during periods of higher order volumes as the manual process lacked the scalability needed to support growth efficiently.”

2. Delivering Measurable Business Value

Since implementing the automation solution, SUTL has experienced significant operational improvements.

“Our company has significantly improved operational efficiency and accuracy. The automation has reduced manual entry by an estimated 70–90%, allowing the team to process customer orders much faster and focus on higher-value activities instead of repetitive order entry. In addition, SO processing errors have been reduced, resulting in more accurate transactions, less rework, and smoother fulfilment and invoicing processes. Overall, the automation has increased productivity, improved data quality, and streamlined the end-to-end order management workflow.”

3. A Collaborative Partnership

As SUTL’s first AI-driven automation initiative, the project involved continuous refinement and close collaboration to meet the unique requirements of different business units.

Reflecting on the implementation journey, Si Yao shared:

“Our overall experience working with the Aristou team has been excellent. As this was our first AI project, adjustments and fine-tuning were unavoidable to meet the needs of each business unit. Throughout the project, the Aristou team was patient and supportive, which contributed significantly to its successful implementation.”

4. Advice for Organisations Considering Automation

For businesses exploring similar digital transformation initiatives, Si Yao believes success begins with selecting the right business process.

“Firstly, identify processes that are highly manual, repetitive, and prone to human error. Then, begin with a well-defined use case and focus on achieving quick wins rather than trying to automate everything at once. Automation is not just a cost-saving initiative; it also improves accuracy, scalability, and customer responsiveness.”

When asked whether they would recommend Aristou to other organisations looking to automate their ERP processes, Si Yao’s response was clear:

“Yes! I would highly recommend Aristou to other organisations looking to automate their processes. The team was responsive, supportive, and committed to delivering a solution that met our business needs, resulting in improved efficiency, accuracy, and productivity.”

Looking Ahead

SUTL’s successful PO-to-SO automation project demonstrates how AI and workflow automation can transform a traditionally manual process into a streamlined, scalable operation without compromising data integrity or business controls.

Beyond improving efficiency, the project has established a strong foundation for future automation initiatives, enabling SUTL to continue enhancing operational performance as its business evolves and a more efficient work environment for their employees.

At Aristou, we believe successful automation is not simply about implementing technology- it’s about understanding your business, identifying opportunities for improvement and delivering practical solutions that create measurable, long-term value.

Ready to begin your automation journey? 

Contact Aristou today for a complimentary consultation. Whether you’re looking to automate document processing, streamline ERP workflows, reduce manual effort, or explore how AI can enhance your business operations, our team is here to help.

Let’s build your next success story-together!