| C1.DAG | System Development |
| C1.MAG | Asset management |
| C1.BAG | Business Management |
| C1.TAG | Tutorials |
| WGC1-9 | Planning issues for newly industrialised and developing countries (Africa) |
| WGC1-10 | Glossary of Terms Used in the Electricity Supply Industry |
| WG C1-12 | The Impact of Transmission Codes on the Planning of Systems |
| WGC1-13 | System Complexity and Dynamic Performance |
| WGC1-14 | Review of Transmission Planning Access Requirements |
| WGC1-15 | Review the drivers for transmission investment decisions and the role of technical planning criteria in transmission investment |
| WGC1-16 | Transmission Asset Risk Management |
| WGC1-17 | Planning to Manage Power Interruption Events |
| WGC1/C2/C6-18 | Coping with limits for very high penetrations of renewable energy |
| WGC1-19 | Green field network, designing future networks ignoring existing constraints |
| WGC1-20 | Accommodating high load growth and urban development in future plans |
| WGC1-21 | What advanced components and technologies are needed and which are available or under development to meet future network development requirements? What are the limits on their use? |
| WGC1-22 | New investment decision processes required to deal with changing economic drivers |
| WGC1-23 | Transmission investment decision points and trees |
| WGC1-24 | Tools for developing Optimum Network Development Plans |
| WG C1-25 | Risk Management and Information Processes for Asset Management in Electricity Transmission Companies for current and future power systems |