PSI is an enterprise management software based on SaaS model (Software as a Service). PSI takes the core business of commercial enterprises: procurement, sales, inventory (invoicing and inventory) as the entry point, and the ultimate goal is an industrialized ERP solution.
PSI official website: https://gitee.com/crm8000/PSI
1. SaaS model
SaaS: Software as a Service Software as a Service, to say that PSI is SaaS, essentially means that PSI is a service.
First of all, PSI is software, which is obviously an open source ERP system written in PHP. Because of the powerful cross-platform function of PHP, many users of PSI deploy PSI on a single machine, a local area network, their own virtual space, and Alibaba Cloud servers.
But also because of this variety of deployment methods, it is easy to misunderstand that PSI is just a piece of software.
So, PSI is a service, what are the aspects reflected in it?
1. The code of PSI itself is completely open source. Anyone can completely privatize the code of PSI, and PSI officials do not profit from selling copies of PSI's code. This is completely different from the traditional business software sales model.
2. Provide free secondary development technical support, which includes: providing complete database design documents; providing complete product manuals; providing free VIP QQ groups; providing free email technical support; providing free telephone technical support . These free services are sufficient for the technical needs of business users who need to save money.
3. For enterprise users without IT power, PSI also provides paid secondary development technical services.
4. Because of the particularity of the ERP product, ERP: three points for software, seven points for implementation, and one point for consulting. This is a long-standing discourse in the industry. The ERP industry itself is a heavy service industry. A large number of personalized needs, need to provide follow-up services, rather than just selling copies of software code. Take a simple example of PSI itself: in the free QQ group of PSI, a large number of problems are actually not related to software technology, but more to business application consulting, how to transform PSI in order to integrate with existing systems, and other architectural problems .
2. Based on the SaaS model, what expansion will be done
On the other hand, we say that PSI is based on the SaaS model, which implies that PSI itself will not be satisfied with implementing the SaaS model alone, but will also do the following extensions.
1. Form the technology stack standard of PSI.
At present, the technical frameworks adopted by PSI are all third-party frameworks, but the cores of these frameworks will be gradually reconstructed in the future. On the one hand, it strengthens the technical content of PSI products, and on the other hand, the technology develops towards the platform. Technology stack standardization is the premise of service standardization.
2. Form PSI ERP data standard to facilitate integration with third-party systems.
Integration with third-party systems is the most common secondary development requirement. The PSI data standard is formed to facilitate the integration of third-party systems at the database level. And data standards are the foundation for providing API-level integration.
Another reason is that ERP software is a product that places great emphasis on data standards.
3. Form PSI ERP implementation service process standards.
For example, many customers do not express their business needs, which is a common scenario in secondary development. PSI assists customers to express their business requirements by providing standardized call templates, which is a standardized implementation service.