Digital & IT

Software as a Service (SaaS)

Written by Pirkka Paronen

Reviewed by Tomi Lehtinen

Key Points

Eliminates the need for local installation and IT infrastructure.
Enables automatic updates, ensuring users always have the latest version.
Supports multi-site access and remote work capabilities.
Subscription model reduces upfront costs and simplifies budgeting.

Definition

SaaS is a cloud-based software delivery model where users access applications via the internet without local installation. It enables scalability, remote access, and continuous updates.

Related Terms

API

An API allows different software systems to communicate and exchange data. It enables integrations between platforms.

Single Sign-On (SSO)

SSO allows users to log in once and access multiple systems. It improves usability and security.

ISO 27001

Information security management standard.

Multi-Factor Authentication (MFA)

MFA requires multiple verification methods to access systems. It significantly improves security.

Electronic Permit to Work (e-PTW)

An electronic Permit to Work system digitizes the traditional PTW process, replacing paper-based permits with a centralized software solution. It enables real-time visibility into all ongoing work, automated workflows, and consistent enforcement of safety rules. Digital systems can integrate risk assessments, approvals, isolations, and communication into one platform. In practice, e-PTW improves efficiency, reduces human error, and enables better data tracking and reporting across sites.

More in Digital & IT

Zero Trust Security

A security model where no user or system is trusted by default. Every access request must be verified.

Frequently Asked Questions

Why is SaaS preferred for PTW systems?

SaaS PTW systems can be deployed quickly across multiple sites without IT infrastructure investment. They ensure all users access the same version with real-time updates and centralized data management.

How is data security handled in SaaS?

Reputable SaaS providers implement ISO 27001, encryption at rest and in transit, regular security audits, and role-based access controls. Data residency and backup policies should be verified during procurement.