RPA is an application of technology, governed by business logic and structured inputs, aimed at automating business processes. Using RPA tools, a company can configure software, or a “robot,” to capture and interpret applications for processing a transaction, manipulating data, triggering responses and communicating with other digital systems. RPA scenarios range from something as simple as generating an automatic response to an email to deploying thousands of bots, each programmed to automate jobs in an ERP system.
Within BPM, automated business processes are managed collectively to improve an organization’s overall workflow in terms of achieving greater efficiency, adapting to changing business needs, reducing human error and clarifying job roles and responsibilities. BPM is itself a subset of infrastructure management, which maintains and optimizes an organization's core operational components such as processes, equipment and data.
In general, testing is finding out how well something works. In terms of human beings, testing tells what level of knowledge or skill has been acquired. In computer hardware and software development, testing is used at key checkpoints in the overall process to determine whether objectives are being met. For example, in software development, product objectives are sometimes tested by product user representatives. When the design is complete, coding follows and the finished code is then tested at the unit or module level by each programmer; at the component level by the group of programmers involved; and at the system level when all components are combined together. At early or late stages, a product or service may also be tested for usability.
Robotic process automation (RPA) is an emerging field that specifically automates artificial intelligence, machine learning, and robotics. Although the technology is getting savvier, RPA mimics high-volume, repeatable human tasks, leaving more abstract duties such as relationship building to the humans. RPA complements BPA, after it streamlines your processes.

Ashok Gudibandla, CEO at Automate.io, notes, “Automation of business processes is of course constantly evolving. It requires alignment of people, processes, and technology. Each part is a challenge. We are experts at the last part, technology (software/systems/AI). The big challenge here is that with more and more systems (email, marketing, sales, customer service, payments) moving to the cloud, there is a fragmentation of data and processes, with each department using their own siloed tools. Automating processes across departments is a big challenge. 
Bots are typically low-cost and easy to implement, requiring no custom software or deep systems integration. Schatsky says such characteristics are crucial as organizations pursue growth without adding significant expenditures or friction among workers. "Companies are trying to get some breathing room so they can serve their business better by automating the low-value tasks," Schatsky says.

Business process automation (BPA), also known as business automation or digital transformation,[1] is the technology-enabled automation of complex[2] business processes. It can streamline a business for simplicity, achieve digital transformation, increase service quality, improve service delivery or contain costs. It consists of integrating applications, restructuring labor resources and using software applications throughout the organization. Robotic process automation is an emerging field within BPA and uses artificial intelligence.