I would rate the scalability an eight out of ten. We have a large user base, so scalability is important.

Approximately 300 individuals actively use the tool.

It is a scalable product. Scalability-wise, I rate the solution a seven or eight out of ten.

My clients are usually enterprise-sized businesses.

IBM Rational DOORS is very easy to scale.

It makes no difference to us whether you have 20 or 2,000 requirements. IBM Rational DOORS makes it simple to manage them.

We have about 35 licenses, but there are many more users. They are all float licensees. 

IBM DOORS is used by approximately 60 people.

It is a scalable solution. We have about 15 end users. We are planning to increase the usage and procure more licenses. 

10-15 users are using this solution. Four to five users are using this solution every day.

I rate the solution’s scalability a seven to eight out of ten.

You can request licenses if you need more access from more users. 

IBM Rational DOORS is a scalable solution. We have 10,000 to 15,000 people at our company. We have about 30 people on our team, but many other users also have access to it. Maybe 100 people access my project.

Developing skilled & experienced specialists that know how to setup DOORS projects and help existing ones adopt best practices takes time and the only way to get real experience is to do it, hard to find the people distributed across the geographical boundaries to fill these roles over prolonged periods of time.

I have worked on programs that varied in size from a couple of hundred requirements up to tens of thousands of requirements in the database. It always seems to work beautifully, irrespective of the size. In this regard, I think that it scales well.

On any given day, we have potentially dozens of administrators and hundreds of users. We have facilities from Florida to New York to California and everywhere in between.

The product is very easy to scale, in my opinion. It will slow down as you scale, but it's the best way to handle a large project in my opinion. It can chew through something big, it just might do it slowly. We have around 500 user accounts. 

IBM Rational DOORS is scalable.

We have approximately 300 users within the region.

DOORS is a file-based data storage system, so it isn't that useful for large user communities. If they want to work with the standard client, it is crucial to have a solid connection between the client and the database software because there's a lot of communication back and forth, so the scalability is not so great. Some of my customers have installations with upwards of 100 clients. 

In my opinion, the solution is scalable, but it is limited because you have to stay within one location. You cannot scale it across the whole world because of the dependency on network performance.

For this solution, we have several hundred users across several databases. In addition to the end-users, we have a system architect, system engineers who put in the requirements, functionality developers who break it down to the system requirements, software developers, and testers.

I think overall it is scalable and has measured up to everything we have tested it with.

The scalability is good in the sense you are allowed to have many users, but performance-wise it will decrease if you have too many. However, it can scale in different ways for certain other requirements, it is very good. I have no issues. It's easy to manage.

We have hundreds of people using this solution, mostly in the engineering department.

This solution is being extensively being used in organizations.

We have two people in the company that uses the solution.

We do not have plans to increase usage. We are moving towards a more digital environment where we are using SysML and UML to write requirements instead of text-based messages. IBM Rational DOORS should have the capability to model these requirements, but currently, the add-on they have is not effective.

While a large number of requirements may be present, managing them effectively is a separate challenge. There are various tools available for managing requirements, such as IBM Rational DOORS, but they may not always be sufficient. Effective requirements management is crucial in this field.

The field of engineering is evolving, moving away from traditional methods of management, such as using tools, such as  IBM Rational DOORS to organize and allocate textual requirements. The 2018 DOD strategy for digital engineering highlights this shift towards utilizing models rather than documents in the digital environment. However, many people are still stuck in the old ways and unaware of this change. It is important to keep in mind that the new way of doing things also involves developing architectures using the modeled requirements.

I rate the scalability of IBM Rational DOORS a ten out of ten.

We have been very successful deploying the product to users in Dallas, Chicago, Ireland, Germany and Japan.

In the projects we've done, we've never bumped into a limit where we needed to do anything to accommodate the project. It just works. So, we've never had to scale it.

In terms of the number of users, we're limited to about three people who use it, and they're all hardware and software engineers. 

It is being used extensively. We use it every day. We could apply it to other things. If there was a lower-cost version of it, we would probably use it more widely through our projects, so that's really more a function of the cost of the product than the usability of it. 

The original version has some scalability problems. In some specific cases, we had some problems managing all of the client's licenses and digital locks. 

We currently have about 25 to 30 licenses and that covers 50 to 70 users.

I have never personally scaled Rational DOORS above approx. 100 active users and at that size we had no problems. I know of organizations that have 1000s of users. The key is to strategically divide your projects among several DOORS servers.

No issues encountered.

From my side, scalability is okay so far. I have not had any bad experiences in our own use or with clients.  

Our clients who use IBM Rational DOORS are usually large, enterprise companies, like airline industry companies, like Siemens, we work with Audi, Mercedes, and BMW. So we are not usually talking about small companies. But they are not all alike and we have clients of all sizes.   

No issues encountered.

DOORS can be scaled to a large number of users and usually modules can contain many attributes and objects. The main issue is the local drives, the faster the drives that DOORS data reside the faster the response on the client. Servers on virtual machines might sometimes be slower because of the way the local drives have been attached to them (storage SANs). But usually is pretty fast. I have worked in environments with more than 300 users and the only issues encountered are the data that were within modules (number of objects) and the history that was recorded. If there is a design behind it on what you need to record within DOORS then usually there are no issues. Sometimes in projects people are getting over excited and from the point that there was no tools and no control and everything was done in paper, they tend to create a lot of attributes to track even the smallest thing, this can create a performance issue as the data recorded are too many.

DOORS can be delivered to distributed teams with Citrix. This in my experience is the best solution as the performance impact through remote access is minimal (XenApp or XenDesktop). It is not advisable to be delivered trough Microsoft terminal server alone as there are performance issues and DOORS is not so usable. Then it can be secured with Netscaler, and delivered to any devise so when people are on the road they can use DOORS to perform their activities from anywhere.

The solution is quite adaptable to encapsulate the growing needs of organizations in terms of growth, new functionalities, and enhancement.

I have not had any performance issues between a Rational DOORS database of 100 requirements vs. one with 10,000+, beyond an expected increase in processing time for dealing with more objects. Even with 100 to 10,000 requirements, processing time for common tasks only goes from a few seconds to a few minutes.

It is based on a single, centralized database server, making multi-site exchange and collaboration somewhat challenging.

I have worked on smaller projects in the past and everything has worked fine, including the requirements and visibility. My clients have been happy and this has caused them to grow by purchasing additional licenses.

That said, this solution does not scale as well as I thought it would, so improvements could be made with respect to scalability.

The solution seems pretty scalable, from what I have seen.

In our organization, we have about 25 people on the solution currently. We've extended slightly. I believe we have at least 50 licenses out there that can be used.

We used it on one programme to start with, but when I left the company, we were using it on five separate programmes.

Rational DOORS is easy to scale.

It's a bit difficult to say how scalable this program is, because you are driven by the number of license that you have. I can't remember the model we're using, but I believe it is a floating license mode. Eventually, if you have too many people connected at the same time on IBM Rational DOORS, the last one can't access to the program. So the scalability is limited by the license scheme. We have around 10,000 users currently. 

I have not encountered any issues with scalability. I have experience of supporting databases containing hundreds of thousands of requirements with no issues that cannot be mitigated through good schema design.

The solution isn't scalable.

When it comes to scalability, I think it is a little bit expensive to get more users onboard. I do not think there are practical limitations to scaling the use, it just might be costly to take on additional licenses to scale.  

No issues encountered.

It is very scalable. You can start with a few sets of data and then add more as needed, so it's very scalable. It is also easy to customize and I am satisfied with it.

Depending on the project, we may have one or two people using this solution, all the way up to perhaps 50 people.

It has scaled for our needs.