Your next big decision when considering a new ERP system? How it will be deployed. There are several approaches to choose from, including traditional on-premise, cloud deployment, or a hybrid combination of both. You will want to consider financial differences and look at each ERP deployment strategy’s strengths and attractions, as well as any unique limitations or challenges. It’s vitally important to consider all options and choose the deployment approach that will best serve your business needs today – and through the foreseeable future.

Before you check out your ERP deployment options, see how – and why – the cloud has become a vital environment for business success in the digital economy.

Why all the interest in cloud deployment?

We all watch with keen interest as computer technology continues to evolve at an ever-increasing pace. The earliest business systems and the first ERP systems were hosted on large mainframe and mid-range computers with “dumb” terminals for user input – after they’d replaced punch cards and key-to-disk input, that is! The next “state-of-the-art” technology was client/server architecture wherein the dumb terminals were replaced by PCs (now called clients) that could handle a portion of the workload. This reduced the amount of data that had to be shuttled back-and-forth with the server computer.

Around the millennium, two significant developments changed the world of computing and ERP: the Internet and the cloud. No longer was it necessary to buy and support hardware and software to run your business. All or major pieces of the technology could now be “rented” or outsourced in a bundle that included all maintenance and much of the technical operations. The ubiquitous Internet provided the communications infrastructure needed to make the cloud practical and available literally anywhere in the world.

But all ERP systems did not immediately migrate to cloud deployment. It took some time for the technology and applications to mature and for companies to realize that the computer does not have to be on-site in order to get reliable access and security for business-critical applications. Part of that evolution involved the developers learning how to:

Explore tips on replacing your legacy ERP and calculating possible ROI.

The SaaS pricing model

In the past, most software was installed on company premises and the only licensing option was to purchase a perpetual license – where the application is licensed for an upfront amount plus a yearly maintenance contract for upgrades and bug fixes. Software licenses are most often priced on a per-user basis. Annual maintenance is commonly charged at 18% to 20% of the then current software list price. This means that the software license is essentially “repurchased” every five to six years.

With on-premise ERP, all the hardware and software is purchased or leased and installed at a company’s location(s). The company is responsible for maintenance, support, and possible upgrades or expansion of the hardware, systems, and application software – as well as the facility space, utilities, insurance, failover resources, and off-site backup storage.

Cloud-based ERP systems, on the other hand, are not typically installed on-site and are supported by the supplier as part of a monthly or annual fee, they are licensed on what is called a software-as-a-service (SaaS) basis. SaaS licenses can be priced per user, per application, or per application set (all of ERP, for example), based on the size of your company, or other variations.

An interesting aspect of cloud deployment licensing is its scalability. If licensed by the user “seat,” you can add or decrease users and pay a higher or lower price thereafter based on the new user count. If your transaction volume, storage capacity, or computing power requirements change, the supplier is responsible for upgrading their facilities to accommodate the change, which means you won’t have to buy and install more servers or more disk storage.

The closest analogy might be cable TV. You pay for what you require, and that price includes use and operation of all the physical facilities, personnel, maintenance, and any other expenses related to the cable service at your location. If you need and add more channels, you will just pay for what you requested and not worry about how they manage to provide the additional channels.

Public vs. private vs. hybrid cloud vs. two-tier

There are four possible ways to implement a true cloud ERP system:

  1. Public cloud ERP

The ERP cloud system provider will have their own data center – or may lease space on a public cloud to host their applications and systems. Your cloud system provider will still take care of all the installation, maintenance, and support for the system and software. The hardware, systems software, and their support are provided by the public cloud. Although some cloud SaaS providers also support private cloud and on-premise deployments, the public cloud is the primary licensing model for software-as-a-service ERP solutions.

Public cloud SaaS ERP systems provide their applications and services on a subscription service, so large, upfront costs are eliminated. Implementation is quicker and easier for the user company because, with all the hardware and software pieces already in place, they can start right in on the data transfer and user training.

The SaaS vendor provides all standard support and maintenance on the software, including installation of any and all updates from the software developer. Any upgrades, such as adding computing power or data storage, are taken care of by the SaaS supplier – as needed and invisibly. The best of cloud ERP software has been written or re-written specifically for the remote server environment, but can also be deployed in public cloud, private cloud, or on-premise servers.

Public cloud-based SaaS ERP has little or no upfront cost (a “capital expense”) but has a somewhat higher monthly cost (an “operating expense”), compared with a typical on-premise installation. When viewed over the normal lifecycle cost period of five to seven years, total cost-of-ownership is similar to, if not less than, an on-premise installation and offers potentially better service, support, and security.

  1. Private cloud ERP

Although similar to the public cloud option, private cloud hardware, system software, and support may be owned, managed, and operated by the company, a third party, or some combination of both for the dedicated use of a single organization. With a private cloud deployment, the user company is usually required to pay for the ERP software license. The third-party ownership option is popular with IT departments that wish to outsource the hardware, database, and much of the networking tasks – giving them some of the benefits of a public cloud.

Private cloud deployment typically has more upfront investment (capital expense) but may work out to a lifecycle cost somewhere between the public cloud and on-premise.

  1. Hybrid cloud ERP

Elements of a private cloud, public cloud, and on-prem ERP deployment can be combined to create a hybrid cloud, which provides the flexibility to choose the optimal deployment for each application. Regulatory issues and special security requirements may dictate the need for on-prem applications in certain situations, or there may be other restrictions and/or preferences that make on-prem desirable – but only for certain applications. A hybrid implementation allows applications and data to move between the options based on workload changes.

Hybrid deployment delivers cloud benefits from that part of the system that is on the cloud. However, it requires more local IT involvement to support the on-prem pieces, as well as the coordination between the two – or more – ERP system environments.

  1. Two-Tier ERP

Really a variation of the hybrid approach, two-tier ERP deployment – sometimes called hub-and-spoke deployment – employs a central system with smaller satellite systems supporting remote facilities. Think of corporate ERP as the hub, with individual ERP systems at subsidiary plants, warehouses, or offices all feeding data back to the hub. This is not a new idea; it emerged during the 1990s’ distributed processing phase, with companies choosing to implement smaller, simpler, and less costly systems at remote locations while maintaining the larger, more capable, corporate system at company headquarters. Any or all of the systems in a two-tier network can be on-prem or cloud-based, purchased or SaaS-licensed.

The overall cost for a two-tier ERP deployment – with less costly systems at the nodes instead of the same corporate system everywhere – will yield a lower cost for the initial purchase. However, integration and support will result in a higher overall, continuing cost because the interfaces must be built and maintained. And, year after year, it will take more IT support to coordinate with multiple suppliers, as well as manage uncoordinated upgrade schedules and interface changes.

What does the term “fake cloud” mean?

Fake cloud, also known as “faux cloud” or “cloud washing,” refers to a legacy ERP system ported to the cloud and perhaps “wrapped” with some additional software to adapt the system to this environment. But these applications are not written for cloud deployment so they cannot really benefit from what cloud has to offer. These are exactly the same legacy ERP applications installed on outsourced hardware. The “wrapper” might present modern, web-like screens to the users, but the input information must be translated into the legacy system’s input requirements and translated back out to the wrapped screens for display – not a very efficient approach. To the user, it looks like the cloud, but it will not perform like a cloud application and will not be able to take advantage of cloud connectivity, advanced functionality, or optimized operational performance.

True cloud ERP vendors design their solutions from the ground up, specifically for the cloud. Cloud-wrapped legacy applications were not designed for the cloud, so performance issues may occur. Customizations and integrations can also be troublesome – and these solutions must still be updated and maintained, often by the user company’s own IT resources.

Since legacy applications ported to the cloud are essentially the same as on-prem applications, pricing is seldom based on usage requirements, so over-buying is possible. Furthermore, the SaaS model is not commonly applied, which means the user company retains all support and upgrade responsibility in-house.

When to choose an on-premise ERP system over cloud

Cloud ERP is not for every company. The number one reason to stay with an on-premise ERP solution is the need for compliance – whether it’s customer, industry, or government requirements regarding regulations and standards. Stricter requirements sometimes require on-premise implementation.

Unreliable internet service is cited by some companies as a reason for not moving to the cloud. For mission-critical ERP applications, being up and available 99% of the time is crucial. However, with modern networks, servers, and processes, downtime is typically no longer a concern and seldom precludes deploying ERP in the cloud.

Data management may be another reason to keep your ERP system on your premises. With a cloud deployment, you may or may not be able to easily move your data – depending on your service provider’s policies. Make sure they support the services you need. (You might want to move a copy to the on-premise server to do testing or training.)

Another reason is loss of control (for example, over security, data, or upgrades). With cloud-based ERP, your company is offloading many IT responsibilities to a third party so it’s important to ensure that the third party is reliable and has a stellar track record. However, some companies still choose to keep everything “in house.”

Tips for the selection process

Choose the ERP software first, then consider the deployment options based on the software’s deployment capabilities and your company’s needs. Some ERP software is cloud or SaaS only, while others offer cloud, on-prem, and hybrid. Deployment options available may be a criterion for inclusion on the short list, but they should not be the sole determinant for system selection.


Companies may initially be drawn to cloud ERP deployment for financial reasons – like little or no capital outlay and reduced total lifecycle cost – but are excited by the technical and operational advantages the cloud has to offer, including:

And, full cloud deployment is not the only option. Sometimes it makes more sense to keep some of the applications on-premise and use the cloud for the rest. Fortunately, a variety of configuration and deployment choices are available so you can choose the deployment that makes the most sense financially and operationally.

Moving to a new ERP system is a significant change for system users, IT, and the entire organization. It makes sense to explore all options and choose the system configuration that offers the best performance at the best cost. Then, plan for how your internal resources and structure will have to change to get the most from your investment, no matter the configuration and deployment.

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