Creation Review

Noticeably in the recent years, there’s a continuous increase in demand, price pressure and complexity in manufacturing. Things need to move faster, be more flexible, and fulfill higher quality standards. Often, optimization in this regard is referred to as Production Performance Management (PPM). The basis for this optimization is information from the machines and devices related to a product, such as:

• Torque and angle for a tightening process
• Influx / efflux of throttle plate test station
• Energy consumption of spindles in a cutting process

Nowadays, brand new machines and software are often shipped with powerful communication capabilities. For older machines, smaller factories and SMEs (Small and Medium Enterprises), it can be a challenge to catch up with the complex IT standards that come along. In fact, sometimes the hardware itself imposes limits.

Nevertheless, in a manufacturing environment, monitoring makes most sense if there are no blind spots. To achieve that, upgrading machines and software is one option, retrofitting another. For the latter, the hurdle should be as low as possible. Yet, there should be a few guidelines for a one-way exchange of the most necessary information (machine messages, measurements):

The structure of the data shall be:

• flexible enough to be carried via multiple protocols,
  
  in order to not reinvent the wheel and leverage on existing technology
• similar in each case,
  
  to be able to use the same software to interpret the data
• easily understandable,
  
  so that implementation in a custom environment won’t be a hurdle
• as simple as possible,
  
  to not produce an opinionated framework
• and yet containing enough information for the use cases,
  
  to fulfill the functional requirements

We decided the least common denominator of necessary information are the mandatory fields, common relevant information to be optional, and the possibility for further extension points through metadata.

Industry benefits of Unide

This open source project aims to make PPM affordable for smaller organizations by reducing cost and complexity of data communication. Through sample implementations of a simple information structure (Production Performance Management Protocol - PPMP) tailored to manufacturing environments, we want to encourage the community to use, share, and evolve this structure together.

PPMP has already been introduced as part of a PPM testbed at a medium-sized Bosch plant, working with many SMEs as partners and suppliers. Furthermore, this testbed aims to create an ecosystem which allows SMEs and larger companies to collaborate efficiently.

The PPMP takes an important role by ensuring interoperability between different types of devices and software. It is designed to gather and aggregate machine and sensor data from different devices. It focuses on defining the JSON payload which can be transferred via a variety of transports (REST, AMQP, MQTT…). The primary goals of PPMP are:

1. Integrating devices (across domains; e.g. manufacturing or energy) for data aggregation and gathering purposes
2. Providing a very lightweight and easy-to-use solution for small and medium-sized enterprises (SMEs)