There are many types and brands of Scada systems and a few types of Process control systems for liquid process, such as Accord. Accord is the platform that provides for any user to build completely object oriented systems; which are built using only configuration, without any tagging or scripting. There are huge advantages to this approach, both for engineering and operations. This is a small write-up of some advantages in a discussion format.
This is a good resource for study of the principles: https://www.academia.edu/4312062/Object_oriented_models_for_advanced_automation_engineering
Operations Advantages
Operations generally starts as a handover during commissioning. Accord uses well designed faceplates with built-in security so the system is easy to access and understand from day 1. The object explorer attached to each faceplate allows access to any device from any screen and list controls automatically update any relevant device changes so commissioning changes are often just graphical and users expect to find relevant items easily in the list controls.
Accord comes with built-in Audit applications. These are very valuable for tracking events and are included in every system.
All operations history can be easily audited, for any time period. Personnel activity, in changing parameters or program or equipment states, can also be easily checked. These audits are very valuable when finding root causes for issues, and the fact that they are included and available, without any additional setup, database configuration or scripting, from time of installation is a huge benefit.
In addition, in terms of Security, Accord can check the settings in the PLC at regular intervals and report on any settings that have changed without authorisation. This makes the systems extremely secure.
Parameters, times and selections, are easy to change in Recipes, with all changes being stored and auditable, for peace of mind.
Perhaps the biggest advantage is in the Plan/MES module which allows operations managers to configure campaigns of programs to be carried out, freeing up operations personnel from having to start or continuously monitor individual programs.
Engineering Advantages
The ability to configure a control system without any tagging or scripting is a huge step from IEC language programming. It is faster and more transparent than any manual method. The transparency means that all persons can see and understand the system operation without knowing PLC IEC languages, scripted or FB/Graph5 type, or any higher level language such as C.
Sometimes big PLC libraries have incompatible parts, due to the size of the library or the development team. The Accord PLC Runtime Library is small and compact and has been developed by a small team which means all the parts are compatible and tested together. The same team uses the library on Accord projects so it is tested completely, in the office and in installations, and is trusted.
The library methods are similar across different PLC and PC platforms, so migration from one PLC to another is really easy with Accord.
The facility to generate matching design and test documentation saves many hours of work on every project. The documents are printed to Word so can be customised, for presentation and acceptance criteria, for example. It is great to be able to hand over documentation during, as well as, immediately after a project, so show the plant operation.