The process category index classifies tools into the following eight categories:
TB - Team Building
IG - Idea Generating
DC - Data Collecting
AT - Analyzing/Trending
ES - Evaluating/Selecting
DM - Decision Making
PP - Planning/Presenting
CI - Changing/Implementing
| Analyzing/Trending | |
| 3 | Action and effect diagram (AED) |
| 5 | Activity analysis |
| 10 | Analysis of variance |
| 14 | Bar chart |
| 18 | Block diagram |
| 19 | Box plot |
| 22 | Breakdown tree |
| 25 | Cause and effect diagram (CED) |
| 26 | Cause and effect diagram adding cards (CEDAC) |
| 37 | Competency gap assessment |
| 40 | Control chart - c (attribute) |
| 41 | Control chart - p (attribute) |
| 42 | Control chart - |
| 44 | Cost of quality |
| 52 | Customer acquisition-defection matrix |
| 54 | Customer satisfaction analysis (CSA) |
| 56 | Cycle time flow chart |
| 63 | Demographic analysis |
| 69 | Dot diagram |
| 75 | Fault tree analysis (FTA) |
| 77 | Five whys |
| 83 | Frequency distribution (FD) |
| 85 | Functional map |
| 86 | Futures wheel |
| 90 | Histogram |
| 99 | Interrelationship digraph (I. D.) |
| 101 | Line chart |
| 104 | Markov analysis |
| 114 | Multivariable chart |
| 116 | Needs analysis |
| 119 | Normal probability distribution |
| 129 | Panel debate |
| 130 | Pareto chart |
| 133 | Pie chart |
| 136 | Polygon |
| 137 | Polygon overlay |
| 143 | Problem analysis |
| 146 | Process analysis |
| 147 | Process capability ratios |
| 149 | Process flowchart |
| 157 | Radar chart |
| 168 | Risk space analysis |
| 171 | Run chart |
| 172 | Run-it-by |
| 174 | SCAMPER |
| 181 | Snake chart |
| 184 | Standard deviation |
| 186 | Stem-and-leaf display |
| 190 | Stratification |
| 191 | Stratum chart |
| 192 | Surveying |
| 194 | Symbolic flowchart |
| 195 | Systems analysis diagram |
| 196 | Task analysis |
| 200 | Thematic content analysis |
| 202 | Timeline chart |
| 205 | Trend analysis |
| 207 | Truth table |
| 209 | Two-directional bar chart |
| 210 | Value analysis |
| 211 | Value/non-value-added cycle time chart |
| 212 | Variance analysis |
| 215 | What-if analysis |
| 218 | Window analysis |
| 219 | Wishful thinking |
| 222 | Yield chart |
| Changing/Implementing | |
| 15 | Barriers-and-aids analysis |
| 62 | Deming PDSA cycle |
| 71 | Events log |
| 72 | Facility layout diagram |
| 74 | Failure mode effect analysis (FMEA) |
| 79 | Fog index |
| 80 | Force field analysis (FFA) |
| 88 | Gap analysis |
| 103 | Major program status |
| 111 | Monthly assessment schedule |
| 121 | Objectives matrix (OMAX) |
| 126 | Organization readiness chart |
| 138 | Potential problem analysis (PPA) |
| 150 | Process mapping |
| 151 | Process selection matrix |
| 155 | Quality chart |
| 166 | Responsibility matrix |
| 169 | Rotating roles |
| 176 | Scenario writing |
| 180 | Shewhart PDCA cycle |
| 201 | Time study sheet |
| 221 | Work flow analysis (WFA) |
| Data Collecting | |
| 6 | Activity cost matrix |
| 17 | Benchmarking |
| 24 | Case study |
| 29 | Checksheet |
| 31 | Circles response |
| 33 | Circles of knowledge |
| 38 | Conjoint analysis |
| 51 | Critical incident |
| 53 | Customer needs table |
| 55 | Customer-first-questions (CFQ) |
| 57 | Data collection strategy |
| 60 | Defect map |
| 78 | Focus group |
| 98 | Information needs analysis |
| 100 | Interview technique |
| 113 | Multiple rating matrix |
| 122 | Observation |
| 156 | Questionnaires |
| 158 | Random numbers generator |
| 164 | Response data encoding form |
| 165 | Response matrix analysis |
| 173 | Sampling method |
| 185 | Starbursting |
| 208 | Two-dimensional survey grid |
| Decision Making | |
| 13 | Balance sheet |
| 39 | Consensus decision making |
| 43 | Correlation analysis |
| 58 | Decision process flowchart |
| 59 | Decision tree diagram |
| 82 | Forced choice |
| 92 | Hypothesis testing (chi-square) |
| 96 | Importance weighting |
| 115 | Multivoting |
| 135 | Point-scoring evaluation |
| 214 | Weighted voting |
| Evaluating/Selecting | |
| 35 | Cluster analysis |
| 36 | Comparison matrix |
| 45 | Cost-benefit analysis |
| 48 | Creativity assessment |
| 49 | Criteria filtering |
| 61 | Delphi method |
| 64 | Dendrogram |
| 73 | Factor analysis |
| 91 | House of quality |
| 93 | Idea advocate |
| 102 | Linking diagram |
| 105 | Matrix data analysis |
| 107 | Measurement matrix |
| 118 | Nominal prioritization |
| 120 | Numerical prioritization |
| 123 | Opportunity analysis |
| 128 | Paired comparison |
| 140 | Prioritization matrix—analytical |
| 141 | Prioritization matrix—combination |
| 142 | Prioritization matrix—consensus |
| 144 | Problem selection matrix |
| 154 | Project prioritization matrix |
| 159 | Ranking matrix |
| 160 | Rating matrix |
| 167 | Reverse brainstorming |
| 177 | Selection matrix |
| 178 | Selection window |
| 183 | Solution matrix |
| 187 | Sticking dots |
| 206 | Triple ranking |
| 213 | Venn diagram |
| Idea Generating | |
| 1 | 5W2H method |
| 2 | 6-3-5 method |
| 8 | Affinity diagram |
| 9 | Analogy and metaphor |
| 11 | Attribute listing |
| 20 | Brainstorming |
| 21 | Brainwriting pool |
| 27 | Checkerboard method |
| 28 | Checklist |
| 30 | Circle of opportunity |
| 34 | Circumrelation |
| 47 | Crawford slip method |
| 50 | Critical dialogue |
| 70 | Double reversal |
| 81 | Forced association |
| 84 | Fresh eye |
| 94 | Idea borrowing |
| 95 | Idea grid |
| 108 | Mental imaging |
| 110 | Mind flow |
| 112 | Morphological analysis |
| 117 | Nominal group technique (NGT) |
| 131 | Phillips 66 |
| 134 | Pin cards technique |
| 170 | Round robin brainstorming |
| 175 | Scatter diagram |
| 179 | Semantic intuition |
| 188 | Stimulus analysis |
| 217 | Wildest idea technique |
| Planning/Presenting | |
| 4 | Action plan |
| 7 | Activity network diagram |
| 12 | Audience analysis |
| 16 | Basili data collection method |
| 46 | Countermeasures matrix |
| 65 | Deployment chart (down-across) |
| 66 | Descriptive statistics |
| 67 | Different point of view |
| 68 | Dimensions cube |
| 87 | Gantt chart |
| 89 | Gozinto chart |
| 97 | Influence diagram |
| 106 | Matrix diagram |
| 109 | Milestones chart |
| 124 | Organization chart |
| 132 | Pictograph |
| 139 | Presentation |
| 145 | Problem specification |
| 148 | Process decision program chart (PDPC) |
| 152 | Program evaluation and review technique (PERT) |
| 153 | Project planning log |
| 162 | Resource histogram |
| 163 | Resource requirements matrix |
| 189 | Storyboarding |
| 193 | SWOT analysis |
| 203 | Top-down flowchart |
| 204 | Tree diagram |
| 216 | Why/how charting |
| 220 | Work breakdown structure (WBS) |
| Team Building | |
| 23 | Buzz group |
| 32 | Circles of influence |
| 76 | Fishbowls |
| 125 | Organization mapping |
| 127 | Pair matching overlay |
| 161 | Relationship map |
| 182 | Sociogram |
| 197 | Team meeting evaluation |
| 198 | Team mirror |
| 199 | Team process assessment |